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VT8601 Apollo ProMedia
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REVISION HISTORY
Document Release
0.92
0.93
0.94
1.0
1.1
1.11
1.2
1.3
Date
12/9/98
Revision
Initials
Initial internal release based on Apollo MVP4 data sheet revision 0.92
DH
Added preliminary pin diagram based on engineering ballout rev 0.3 11/10/98
Added Slot-1 pinouts from Apollo Pro Plus Data Sheet
Replaced feature list, overview, and vblock diagram from product brief
12/16/98 Updated pinouts to match engineering rev 0.5 document dated 12/1/98
DH
1/20/99 Updated pinouts to match engineering rev 0.8 document dated 12/22/98
DH
6/4/99
Added 133 MHz Support to Feature Bullets
DH
Updated / Fixed Pin Descriptions:
Fixed description of strap options on MA2, MA8, and MA11-14
Removed Auxiliary Memory Port
Added REQ/GNT[4-7]#
Added GND & VCC3 pins to increase pin count to 510 (updated mech spec)
Fixed definitions of RESET# & CRSTI# and changed CRSTI# to CPURSTD#
Removed PWRGD function from SERR#
Fixed definitions of SRAS#, SCAS#, and SWE#
Added note to PLLTST description
Updated Device 0 Registers Rx50-53, 68[4], 69, 6B[5-1], 6C[7-4], 70[3,0,
72[0], 76[7], 79[1-0], 7A (added)
Updated Device 1 Registers Rx41[0], 42[0]
6/23/99 Updated feature bullets & overview and fixed misc formatting problems
DH
Fixed REQ/GNT4# pinouts and CKE & DQM naming polarity
Device 0 Bus 0 updated Rx2-3 Device ID, 69[7-6], 6D[6-5], 76[6]
Device 0 Bus 0 added Rx2C-D, 2E-F, 50[1], 51[5], 53[2], removed 6E-6F
Device 0 Bus 1 updated Rx0-3 Vendor & Device ID, Rx7-6[7]
Removed AC timing specs
7/8/99
Fixed pin descriptions of CPURSTD# and SUSP
DH
8/23/99 Fixed typo in device 0 Rx50[7] description; added comment about default state
DH
Fixed system frequency divider settings (MA pin descriptions, Dev 0 Rx68[1-0])
9/8/99
Fixed strap options on MA2-6 and MA13 pin descriptions
DH
Fixed Device 0 Rx52[7] strap option and removed (reserved) Device 0 Rx52[5]
Removed “VIA Confidential” watermark
Revision 1.3 September 8, 1999
-i-
Revision History
VT8601 Apollo ProMedia
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TABLE OF CONTENTS
REVISION HISTORY........................................................................................................................................................................I
TABLE OF CONTENTS.................................................................................................................................................................. II
LIST OF FIGURES..........................................................................................................................................................................IV
LIST OF TABLES ...........................................................................................................................................................................IV
APOLLO PROMEDIA...................................................................................................................................................................... 1
SYSTEM OVERVIEW...................................................................................................................................................................... 6
APOLLO PROMEDIA CORE LOGIC OVERVIEW ............................................................................................................................ 7
APOLLO PROMEDIA GRAPHICS CONTROLLER OVERVIEW ........................................................................................................ 8
Capability Overview............................................................................................................................................................... 8
System Capabilities................................................................................................................................................................. 9
High Performance 64-bit 2D GUI.......................................................................................................................................... 9
Highly Integrated RAMDACTM & Clock Synthesizer......................................................................................................... 9
Full Feature High Performance 3D Engine .......................................................................................................................... 9
Video Processor..................................................................................................................................................................... 10
Video Capture and DVD ...................................................................................................................................................... 10
Versatile Frame Buffer Interface ........................................................................................................................................ 10
Hi-Res and Hi-Ref Display Support .................................................................................................................................... 10
CRT Power Management (VESA DPMS) .......................................................................................................................... 11
Flat Panel Interface .............................................................................................................................................................. 11
Video Capture Interface....................................................................................................................................................... 11
Complete Hardware Compatibility ..................................................................................................................................... 11
PINOUTS .......................................................................................................................................................................................... 12
PIN DESCRIPTIONS ...................................................................................................................................................................... 15
REGISTERS ..................................................................................................................................................................................... 23
REGISTER OVERVIEW ................................................................................................................................................................. 23
REGISTER SUMMARY TABLES ..................................................................................................................................................... 23
MISCELLANEOUS I/O................................................................................................................................................................... 33
CONFIGURATION SPACE I/O ....................................................................................................................................................... 33
REGISTER DESCRIPTIONS............................................................................................................................................................ 34
Device 0 Bus 0 Header Registers - Host Bridge.................................................................................................................. 34
Device 0 Bus 0 Host Bridge Registers ................................................................................................................................. 36
CPU Interface Control .......................................................................................................................................................................... 36
DRAM Control ..................................................................................................................................................................................... 38
PCI Bus Control.................................................................................................................................................................................... 44
GART / Graphics Aperture Control ...................................................................................................................................................... 48
AGP Control ......................................................................................................................................................................................... 50
Device 1 Bus 0 Header Registers - PCI-to-AGP Bridge .................................................................................................... 52
Device 1 Bus 0 PCI-to-AGP Bridge Registers .................................................................................................................... 54
AGP Bus Control .................................................................................................................................................................................. 54
Device 0 Bus 1 Header Registers - Graphics Accelerator.................................................................................................. 55
Device 0 Bus 1 Graphics Accelerator Registers ................................................................................................................. 58
Graphics Accelerator PCI Bus Master Registers................................................................................................................................... 59
VGA Standard Registers - Introduction ................................................................................................................................................ 65
Capture / ZV Port Registers .................................................................................................................................................................. 66
DVD Registers ...................................................................................................................................................................................... 67
Revision 1.3 September 8, 1999
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Table of Contents
VT8601 Apollo ProMedia
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VGA Registers....................................................................................................................................................................... 70
Attribute Controller Registers (AR) ...................................................................................................................................................... 70
VGA Status / Enable Registers ............................................................................................................................................................. 70
VGA Sequencer Registers (SR) ............................................................................................................................................................ 71
VGA RAMDAC Registers .................................................................................................................................................................... 71
VGA Graphics Controller Registers (GR)............................................................................................................................................. 72
VGA CRT Controller Registers (CR) .................................................................................................................................................. 73
VGA Extended Registers...................................................................................................................................................... 74
VGA Extended Registers – Non-Indexed I/O Ports.............................................................................................................................. 74
VGA Extended Registers – Sequencer Indexed .................................................................................................................................... 75
VGA Extended Registers – Graphics Controller Indexed ..................................................................................................................... 85
VGA Extended Registers – CRT Controller Indexed............................................................................................................................ 91
VGA Extended Registers – CRTC Shadow ........................................................................................................................................ 105
3D Graphics Engine Registers ........................................................................................................................................... 106
Operational Concept ........................................................................................................................................................................... 106
Drawing............................................................................................................................................................................................... 107
Geometry Primitives............................................................................................................................................................................ 108
Synchronization .................................................................................................................................................................................. 111
Functional Blocks ............................................................................................................................................................................... 111
Bus Interface ....................................................................................................................................................................................... 111
Span Engine......................................................................................................................................................................... 112
Graphics Engine Core ........................................................................................................................................................ 113
Graphics Engine Organization ............................................................................................................................................................ 116
Setup Engine Registers ....................................................................................................................................................................... 117
Vertex Registers .................................................................................................................................................................................. 118
Rasterization Engine Registers............................................................................................................................................................ 119
Pixel Engine Registers ........................................................................................................................................................................ 126
Texture Engine Registers .................................................................................................................................................................... 132
Memory Interface Registers ................................................................................................................................................................ 134
Data Port Area..................................................................................................................................................................................... 134
FUNCTIONAL DESCRIPTIONS ................................................................................................................................................ 135
SYSTEM CONFIGURATION ......................................................................................................................................................... 135
DFP Interface Configuration............................................................................................................................................. 135
GRAPHICS CONTROLLER POWER MANAGEMENT ................................................................................................................... 136
Power Management States................................................................................................................................................. 136
Power Management Clock Control................................................................................................................................... 136
Power Management Registers ........................................................................................................................................... 136
ELECTRICAL SPECIFICATIONS............................................................................................................................................. 137
ABSOLUTE MAXIMUM RATINGS ............................................................................................................................................... 137
DC CHARACTERISTICS.............................................................................................................................................................. 137
AC TIMING SPECIFICATIONS .................................................................................................................................................... 137
MECHANICAL SPECIFICATIONS ........................................................................................................................................... 138
Revision 1.3 September 8, 1999
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Table of Contents
VT8601 Apollo ProMedia
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LIST OF FIGURES
FIGURE 1.
FIGURE 2.
FIGURE 3.
FIGURE 4.
FIGURE 5.
FIGURE 6.
FIGURE 7.
FIGURE 8.
FIGURE 9.
VT8601 BALL DIAGRAM (TOP VIEW) ................................................................................................................ 12
VT8601 PIN LIST (NUMERICAL ORDER) – USING DFP, TVOUT, & VIDEO CAPTURE PORTS ............ 13
VT8601 PIN LIST (ALPHABETICAL ORDER) .................................................................................................... 14
GRAPHICS APERTURE ADDRESS TRANSLATION ......................................................................................... 48
PHYSICAL REGION DESCRIPTOR TABLE FORMAT..................................................................................... 60
PCI BUS MASTER ADDRESS TRANSLATION ................................................................................................... 60
FRAME BUFFER PARAMETERS .......................................................................................................................... 98
LIVE VIDEO DISPLAY PARAMETERS................................................................................................................ 98
MECHANICAL SPECIFICATIONS - 510-PIN BALL GRID ARRAY PACKAGE ......................................... 138
LIST OF TABLES
TABLE 1. VT8601 PIN DESCRIPTIONS .................................................................................................................................... 15
TABLE 2. REGISTER SUMMARY.............................................................................................................................................. 23
TABLE 3. SYSTEM MEMORY MAP.......................................................................................................................................... 38
TABLE 4. MEMORY ADDRESS MAPPING TABLE ............................................................................................................... 39
TABLE 5. VGA/MDA MEMORY/IO REDIRECTION.............................................................................................................. 54
TABLE 6. SUPPORTED PCI COMMAND CODES................................................................................................................... 55
TABLE 7. INTERRUPT SOURCES AND CONTROLS ............................................................................................................ 57
TABLE 8. GRAPHICS CLOCK FREQUENCIES – 14.31818 MHZ REFERENCE................................................................ 77
TABLE 9. DPMS SEQUENCE - HARDWARE TIMER MODE ............................................................................................... 88
TABLE 10. DPMS SEQUENCE - HARDWARE MODE IN SIMULTANEOUS DISPLAY MODE ..................................... 88
TABLE 11. HARDWARE CURSOR PIXEL OPERATION ...................................................................................................... 95
TABLE 12. PCI POWER MANAGEMENT STATES .............................................................................................................. 136
TABLE 13. ABSOLUTE MAXIMUM RATINGS ..................................................................................................................... 137
TABLE 14. DC CHARACTERISTICS ....................................................................................................................................... 137
TABLE 15. AC TIMING MIN / MAX CONDITIONS.............................................................................................................. 137
Revision 1.3 September 8, 1999
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Table of Contents
VT8601 Apollo ProMedia
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VIA VT8601
APOLLO PROMEDIA
66 / 100 / 133 MHz
Single-Chip Slot-1 / Socket-370 PCI North Bridge,
With Integrated AGP 2D / 3D Graphics Accelerator
and Advanced Memory Controller
supporting PC100 / PC133 and VCM SDRAM
For Desktop PC Systems
• General
− 510 BGA Package (35mm x 35mm )
− 2.5 Volt core with 3.3V CMOS I/O
− Supports GTL+ I/O buffer Host interface
− Supports separately powered 5.0V tolerant interface to PCI bus and Video interface
− 2.5V, 0.25um, high speed / low power CMOS process
− PC98 / 99 compatible using VIA VT82C686A (352-pin BGA) south bridge chip for Desktop and Mobile
applications
− 66 / 100 / 133 MHz CPU Front Side Bus (FSB) Operation
• High Integration
− Single chip implementation for 64-bit Slot-1 and Socket-370 CPUs, 64-bit system memory, 32-bit PCI with
integrated 2D / 3D GUI accelerator
− Apollo ProMedia Chipset: VT8601 system controller and VT82C686A PCI to ISA bridge
− Chipset includes dual UltraDMA-33/66 EIDE, AC-97 link, 4 USB ports, integrated Super-I/O, hardware monitoring,
keyboard / mouse interfaces, and RTC / CMOS
• High Performance CPU Interface
− Supports Slot-1Intel Pentium IITM / Pentium IIITM and Socket-370 CeleronTM processors
− 66 / 100 / 133 MHz CPU Front Side Bus (FSB)
− Built-in PLL (Phase Lock Loop) circuitry for optimal skew control within and between clocking regions
− Five outstanding transactions (four In-Order Queue (IOQ) plus one input latch)
− Supports WC (Write Combining) cycles
− Dynamic deferred transaction support
− Sleep mode support
− System management interrupt, memory remap and STPCLK mechanism
CPU
133 MHz
133 MHz
100 MHz
100 MHz
100 MHz
66 MHz
66 MHz
DRAM
133 MHz
100 MHz
133 MHz
100 MHz
66 MHz
100 MHz
66 MHz
GUI Core
100 MHz
100 MHz
100 MHz
100 MHz
66 MHz
100 MHz
66 MHz
Revision 1.3 September 8, 1999
Internal AGP
66 MHz
66 MHz
66 MHz
66 MHz
66 MHz
66 MHz
66 MHz
PCI
33 MHz
33 MHz
33 MHz
33 MHz
33 MHz
33 MHz
33 MHz
-1-
Comments
Synchronous (DRAM uses CPU clock)
Pseudo-synchronous (DRAM uses GUI clock)
Pseudo-synchronous (DRAM uses GUI clock)
Synchronous (DRAM uses CPU clock)
Pseudo-synchronous (DRAM uses GUI clock)
Pseudo-synchronous (DRAM uses GUI clock)
Synchronous (DRAM uses CPU clock)
Features
VT8601 Apollo ProMedia
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• Internal Accelerated Graphics Port (AGP) Controller
− AGP v1.0 compliant
− Pipelined split-transaction long-burst transfers up to 533 MB/sec
− Eight level read request queue
− Four level posted-write request queue
− Thirty-two level (quadwords) read data FIFO (128 bytes)
− Sixteen level (quadwords) write data FIFO (64 bytes)
− Intelligent request reordering for maximum AGP bus utilization
− Supports Flush/Fence commands
− Graphics Address Relocation Table (GART)
− One level TLB structure
− Sixteen entry fully associative page table
− LRU replacement scheme
− Independent GART lookup control for host / AGP / PCI master accesses
− Windows 95 OSR-2 VXD and integrated Windows 98 / NT5 miniport driver support
• Concurrent PCI Bus Controller
− PCI bus is synchronous / pseudo-synchronous to host CPU bus
− 33 MHz operation on the primary PCI bus
− Supports up to five PCI masters
− Peer concurrency
− Concurrent multiple PCI master transactions; i.e., allow PCI masters from both PCI buses active at the same time
− Zero wait state PCI master and slave burst transfer rate
− PCI to system memory data streaming up to 132Mbyte/sec
− PCI master snoop ahead and snoop filtering
− Six levels (double-words) of CPU to PCI posted write buffers
− Byte merging in the write buffers to reduce the number of PCI cycles and to create further PCI bursting possibilities
− Enhanced PCI command optimization (MRL, MRM, MWI, etc.)
− Forty-eight levels (double-words) of post write buffers from PCI masters to DRAM
− Sixteen levels (double-words) of prefetch buffers from DRAM for access by PCI masters
− Supports L1/L2 write-back forward to PCI master read to minimize PCI read latency
− Supports L1/L2 write-back merged with PCI master post-write to minimize DRAM utilization
− Delay transaction from PCI master reading DRAM
− Read caching for PCI master reading DRAM
− Transaction timer for fair arbitration between PCI masters (granularity of two PCI clocks)
− Symmetric arbitration between Host/PCI bus for optimized system performance
− Complete steerable PCI interrupts
− PCI-2.2 compliant, 32 bit 3.3V PCI interface with 5V tolerant inputs
Revision 1.3 September 8, 1999
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Features
VT8601 Apollo ProMedia
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• Advanced High-Performance DRAM Controller
− DRAM interface synchronous or pseudosynchronous with CPU FSB speed of 66 / 100 / 133 MHz
− DRAM interface may be faster than CPU by 33 MHz to allow use of PC100 with 66 MHz Celeron CPU or use of
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
PC133 with 100 MHz Pentium II or Pentium III CPU
DRAM interface may be slower than CPU by 33 MHz to allow use of older memory modules with a newer CPU
Concurrent CPU, AGP, and PCI access
Supports FP, EDO, SDRAM and VCM-SDRAM memory types
Different DRAM types may be used in mixed combinations
Different DRAM timing for each bank
Dynamic Clock Enable (CKE) control for SDRAM power reduction in high speed systems
Mixed 1M / 2M / 4M / 8M / 16M / 32MxN DRAMs
6 banks DRAMs supported up to 1GB (256Mb DRAM technology)
Flexible row and column addresses
64-bit data width only
3.3V DRAM interface with 5V-tolerant inputs
Programmable I/O drive capability for MA, command, and MD signals
Two-bank interleaving for 16Mbit SDRAM support
Two-bank and four bank interleaving for 64Mbit SDRAM support
Supports maximum 8-bank interleave (i.e., 8 pages open simultaneously); banks are allocated based on LRU
Independent SDRAM control for each bank
Seamless DRAM command scheduling for maximum DRAM bus utilization
(e.g., precharge other banks while accessing the current bank)
Four cache lines (16 quadwords) of CPU to DRAM write buffers
Four cache lines of CPU to DRAM read prefetch buffers
Read around write capability for non-stalled CPU read
Speculative DRAM read before snoop result
Burst read and write operation
x-2-2-2-2-2-2-2 back-to-back accesses for EDO DRAM from CPU or from DRAM controller
x-1-1-1-1-1-1-1 back-to-back accesses for SDRAM
BIOS shadow at 16KB increment
Decoupled and burst DRAM refresh with staggered RAS timing
CAS before RAS or self refresh
Revision 1.3 September 8, 1999
-3-
Features
VT8601 Apollo ProMedia
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• General Graphic Capabilities
− 64-bit Single Cycle 2D/3D Graphics Engine
− Supports 2 to 8 Mbytes of Frame Buffer
− Real Time DVD MPEG-2 and AC-3 Playback
− Video Processor
− I2C Serial Interface
− Integrated 24-bit 230MHz True Color DAC
− Extended Screen Resolutions up to 1600x1200
− Extended Text Modes 80 or 132 columns by 25/30/43/60 rows
− DirectX 6 and OpenGL ICD API
• Graphics Performance
− Sustained 1M polygons/second and 100M pixels/second
− 30fps DVD playback of 9.8Mbps MPEG-2 video with 30% headroom
− Host Based AC-3 decode at only 8% utilization
• High Performance rCADE3D™ Accelerator
− 32 entry command queue, 32 entry data queue
− 4Kbyte texture cache with over 90% hit rates
− Pipelined Single Cycle Setup/Texturing/Rendering Engines
− DirectDraw™ acceleration
− Multiple buffering and page flipping
−
−
−
−
Setup Engine
32-bit IEEE floating point input data
Slope and vertex calculations
Back facing triangle culling
1/16 sub-pixel positioning
−
−
−
−
−
−
−
Rendering Engine
High performance single pass execution
Diffused and specula lighting
Gouraud and flat shading
Anti-aliasing including edge, scene, and super-sampling
OpenGL compliant blending for fog and depth-cueing
16-bit Z-buffer
8/16/32 bit per pixel color formats
−
−
−
−
−
−
Texturing Engine
1/2/4/8-bits per pixel compact palletized textures
16/32-bits per pixel quality non-palletized textures
Pallet formats in ARGB 565, 1555, or 444
Tri-linear, bi-linear, and point-sampled filtering
Mip-mapping with multiple Level-Of-Detail (LOD) calculations and perspective correction
Color keying for translucency
−
−
−
−
−
−
2D GUI Engine
8/15/16/24/32-bits per pixel color formats
256 Raster Operations (ROPs)
Accelerated drawing: BitBLTs, lines, polygons, fills, patterns, clipping, bit masking
Panning, scrolling, clipping, color expansion, sprites
32x32 and 64x64 Hardware Cursor
DOS graphics and text modes
Revision 1.3 September 8, 1999
-4-
Features
VT8601 Apollo ProMedia
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• DVD
− Hardware-Assisted MPEG-2 Architecture for DVD with AC-3
− Simultaneous motion compensation and front-end processing (parsing, decryption and decode)
− Supports full DVD 1.0, VCD 2.0 and CD-Karaoke
− Microsoft DirectShow 3.0 native support, backward compatible to MCI
− No additional frame buffer requirements
− Sub-picture hardware eliminates Run-Length-Decoder and Alpha Blending overhead
− Dynamic frame and field de-interlace filtering for high quality playback on VGA monitors (Bob and Weave)
− Tamper-proof software CSS implementation
− Freeze, Fast-Forward, Slow Motion, Reverse
− Pan-and-Scan support for 16:9 sequence
• Video Processor
− On-chip Color Space Converter (CSC)
− Anti-tearing via two frame buffer based capture surfaces
− Minifier for video stream compression and filtering
− Horizontal/vertical interpolation with edge recovery
− Dual frame buffer apertures for independent memory access for graphics and video
− YUV 4:2:2/4:1:1/4:2:0 and RGB formats
− Video Module Interface (VMI) to MPEG and video decoder
− Vertical Blank Interval for Intercast™
− Overlay differing video and graphic color depths
− Minifier Video Module Interface (VMI) to MPEG and video decode
− Display two simultaneous video streams from both internal AGP and VMI
− Two scalers and Color Space Converters (CSC) for independent windows
• Flat Panel Interface
− 85MHz Flat Panel interface supports 1024x768 panels
− Support for TFT, STN & DSTN panel technologies
− Allows external LVDS or TMDS transmitter for advanced panel interfaces
• Power Management Support
− Dynamic power down of SDRAM (CKE)
− Independent clock stop controls for CPU / SDRAM, AGP, and PCI bus
− PCI and AGP bus clock run and clock generator control
− VTT suspend power plane preserves memory data
− Suspend-to-DRAM and Self-Refresh operation
− EDO self-refresh and SDRAM self-refresh power down
− 8 bytes of BIOS scratch registers
− Low-leakage I/O pads
• Testability
− Build-in NAND-tree pin scan test capability
Revision 1.3 September 8, 1999
-5-
Features
VT8601 Apollo ProMedia
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SYSTEM OVERVIEW
The Apollo ProMedia is a PC Slot-1 system logic North Bridge with integrated 2D/3D Graphics accelerator. The core logic
portion of the chip is based on the VIA Apollo Pro133 with integrated graphics accelerator provided by an industry leading
Graphics supplier. The combination of the two leading edge technologies provides a stable, cost-effective, and high performance
solution to both the Desktop and Mobile personal computer markets. As shown in Figure 1 below, the Apollo ProMedia will
interface to:
•
Slot-1 Front-Side Bus (66 – 133 MHz)
•
PC66 / PC100 / PC133 SDRAM Memory Interface
•
PCI Bus (30 - 33 MHz)
•
Analog RGB Monitor with DDC
•
Various Flat Panels or Digital Monitor Transmitters (TMDS or LVDS)
•
Video Capture / Playback CODECs
Celeron or
Pentium-II / III
Processor
TDMS/LVDS
TV Signal
TV Encoder
Apollo
ProMedia
510 BGA
CNTLs
D
R
A
MA[13:0]
M
MD[63:0]
VMI
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Figure 1: Apollo ProMedia High Level System Diagram
Revision 1.3 September 8, 1999
-6-
System Overview
VT8601 Apollo ProMedia
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Apollo ProMedia Core Logic Overview
Apollo ProMedia – System Media Accelerated North Bridge (SMA) – is a high performance, cost-effective and energy efficient
solution for the implementation of Integrated 2D / 3D Graphics - PCI - ISA desktop and notebook personal computer systems
from 66 MHz to 133 MHz based on 64-bit Slot-1 Intel Pentium II, Pentium III, and Celeron processors. The complete solution
consists of the Apollo ProMedia controller / “north bridge” (510 BGA) and either the VT82C596B (324 BGA) or the VT82C686A
(352 BGA) PCI-to-ISA south bridge. Both south bridges are PC98 / PC99 compliant with integrated UltraDMA-33 / 66 IDE, 4
USB ports, and a complete power management feature set. The VT82C686A also integrates HW monitoring, Super-I/O functions
(floppy disk drive interface and serial / parallel ports), and AC-97 link supporting digital audio and HSP modem functions.
Apollo ProMedia supports six banks of DRAMs up to 1GB. The DRAM controller supports standard Fast Page Mode (FP)
DRAM, EDO-DRAM, Synchronous DRAM (SDRAM), and Virtual Channel Synchronous DRAM (VC-SDRAM) in a flexible
mix / match manner. The Synchronous DRAM interface allows zero wait state bursting between the DRAM and the data buffers
at 100 MHz. The six banks of DRAM can be composed of an arbitrary mixture of 1M / 2M / 4M / 8M / 16M / 32MxN DRAMs.
The DRAM Controller is optimized to run synchronous with the CPU Front Side Bus (FSB) frequency of 66 MHz, 100 MHz, or
133 MHz.
The Apollo ProMedia also supports full AGP v1.0 capability with the internal 2D/3D Graphics Engine for maximum software
compatibility. An eight level request queue plus a four level post-write request queue with thirty-two and sixteen quadwords of
read and write data FIFO’s respectively are included for deep pipelined and split AGP transactions. A single-level GART TLB
with 16 full associative entries and flexible CPU/AGP/PCI remapping control is also provided for operation under protected mode
operating environments. Both Windows-95 VXD and Windows-98 / NT5 miniport drivers are supported.
The Apollo ProMedia supports one 32-bit 3.3 / 5V system bus (PCI) that is synchronous / pseudo-synchronous to the CPU bus.
The chip also contains a built-in AGP bus-to-PCI bus bridge to allow simultaneous concurrent operations on each bus. Five levels
(doublewords) of post write buffers are included to allow for concurrent CPU and PCI operation. For PCI master operation, fortyeight levels (doublewords) of post write buffers and sixteen levels (doublewords) of prefetch buffers are included for concurrent
PCI bus and DRAM/cache accesses. The chip also supports enhanced PCI bus commands such as Memory-Read-Line, MemoryRead-Multiple and Memory-Write-Invalid commands to minimize snoop overhead. In addition, advanced features are supported
such as snoop ahead, snoop filtering, L1 / L2 write-back forward to PCI master, and L1 / L2 write-back merged with PCI post
write buffers to minimize PCI master read latency and DRAM utilization. Delay transaction and read caching mechanisms are
also implemented for further improvement of overall system performance.
For sophisticated notebook implementations, the Apollo ProMedia provides independent clock stop control for the CPU /
SDRAM, PCI, and AGP buses and Dynamic CKE control for powering down of the SDRAM. A separate suspend-well plane is
implemented for the SDRAM control signals for Suspend-to-DRAM operation. Coupled with the 324-pin Ball Grid Array VIA
VT82C596A south bridge chip, a complete notebook PC main board can be implemented with no external TTLs.
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System Overview
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Apollo ProMedia Graphics Controller Overview
The Apollo ProMedia Graphics Controller is a highly integrated display control device that incorporates a 64-bit 3D/2D graphic
engine and video accelerator with advanced DVD video and optional TV output capability. It provides a flexible and high
performance solution for graphics and video playback acceleration for various color depth and resolution modes.
The Apollo ProMedia Graphics Controller supports a video capture port to import captured live MPEG 1 or MPEG 2 video
streams, or DVD decompressed video streams to be overlaid with a graphics stream of mixed color depth displays. In supporting
dual live videos, the Apollo ProMedia Graphics Controller offers independent dual video windows ready for videoconferencing
and with linear scaling capability.
Integrating the programmable phase lock loop with high speed LUT DACs, the Apollo ProMedia Graphics Controller is a true
price/performance solution for the modern multimedia based entertainment PC.
Capability Overview
The Apollo ProMedia Graphics Controller is a fully integrated CRT and TV 64-bit 2D/3D Accelerator. The high performance
graphics engine offers high speed 3D image processing in full compliance and compatibility with IBM® VGA and VESA™
extended VGA. As an integrated controller, it allows unprecedented cost and performance advantages by eliminating the need for
an external frame buffer while at the same time gaining local access to a larger amount of memory. Many functions can now be
eliminated that previously consumed large amounts of bandwidth.
The Apollo ProMedia Graphics Controller, equipped with a single-cycle 3D GUI Engine, pipelines 3D rendering process
architecture in hardware, providing real-time interactions with solid 3D models in CAD/CAM, 3D modeling, and 3D games. It
supports all key 3D rendering operations, including: Gouraud shading for smooth object surfaces, texture mapping for realistic
object textures, 16-bit hardware Z-buffering for fast 3D depth calculations, and Alpha Blending for transparency effects.
The Apollo ProMedia Graphics Controller’s highly innovative design, a full 64-bit memory interface with a high performance
graphics engine which can support a RAMDAC™ running up to 230MHz, dramatically improves GUI functions and significantly
promotes overall system operation.
The Apollo ProMedia Graphics Controller supports a full AGP implementation internally to remain compatible with existing
software and programming models. However, since the engine is integrated it enjoys a higher bandwidth and lower latency than is
possible with discrete solutions. AGP operations can include direct access of the system memory by the 2D/3D engine to provide
increased texture memory.
To meet the requirements of a PC99 graphics adapter in a multimedia PC, the Apollo ProMedia Graphics Controller supports
planar video format for MPEG-1, MPEG-2, and DVD-video playback. The dual video playback is capable of overlaying windows
for videoconferencing and multimedia displays. Advanced features of the Apollo ProMedia Graphics Controller, such as color
space conversion, video scaling, dual video windows, dual-view display, Video Module Interface (VMI), Vertical Blanking
Interleave (VBI), a 24-bit True Color DAC, and triple clock synthesizers allow performance at peak levels.
By using an extended 16-bit VMI port the Apollo ProMedia Graphics Controller can support DTV resolution. This port can
operate as either an input for Video Capture or as an output for Video display. The Apollo ProMedia Graphics Controller is
capable of supporting three simultaneous displays: CRT, Flat Panel & Video, each with a different “window” or desktop.
Apollo ProMedia Graphics Controller supports a rich featured flat panel interface that can be used to directly control a flat panel
device. Alternatively, it can drive an LVDS or TMDS transmitter to support the latest Flat Panel displays requiring these
interfaces.
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System Overview
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System Capabilities
The Apollo ProMedia Graphics Controller’s main system features include:
•
•
•
•
•
•
•
•
•
•
•
•
•
High Performance single cycle GUI
Highly Integrated RAMDAC™ and Triple Clock Synthesizer
Full Feature High Performance 3D Graphics Engine
High speed internal AGP Bus Mastering data bus supporting DVD video playback & 3D
Hardware implementation of motion compensation
Dual Video Windows for Videoconferencing
TrueVideo Processor
DirectDrawTM and DirectVideoTM Hardware Support
Versatile Motion Video Capture/Overlay/Playback Support
Flexible Frame Buffer Memory Interface
Advanced Mobile Power Management
CRT Power Management (VESA™ DPMS)
PC99 Hardware Support
High Performance 64-bit 2D GUI
The 64-bit graphics engine of the Apollo ProMedia Graphics Controller significantly improves graphics performance through
specialized hardware that accelerates the most frequently used GUI operations and matches the high-speed requirements of CPUs.
Functions directly supported in hardware include: BitBLTs, image and text transfer, line draw, short stroke vector draw, rectangle
fills, and clipping. The graphics engine supports 256 Raster Operations (ROPs) for up to 32-bit packed pixel graphic modes. The
ROP3 Processor in the Apollo ProMedia Graphics Controller is able to perform Boolean functions which allow many additional
operations, including transparency, pattern masking, color expansion alignment, and pattern enhancement. Additionally, the
graphics engine features linear display memory addressing (up to 4GB memory space), accelerated color expansion modes for
graphics text procession, and memory-mapped I/O registers on the graphics engine for faster access time.
Graphic functions are optimized by a 64-bit internal data bus and a four-color hardware cursor/pop-up icon, operating up to a
128x128x2 pixel image, which offloads the CPU. The hardware cursor mechanism can also be used to display patterns stored in
the system memory. This pop-up icon is very useful to display user friendly information instantly through simple hot key
operations. This advanced function combination allows significant performance increases over standard Super VGA designs and
provides outstanding graphics acceleration on GUIs, such as Microsoft Windows 98.
Highly Integrated RAMDACTM & Clock Synthesizer
The highly integrated design of the Apollo ProMedia Graphics Controller offers a “no TTL” solution for cost-effective, highperformance multimedia subsystem designs for the PC and compatible notebooks. The 64-bit memory data bus supporting
SDRAM and SGRAM memory provides faster data transfer rates for improved system throughput. The Apollo ProMedia
Graphics Controller has a built-in, high speed RAMDACTM. The RAMDACTM is composed of one 256x24 and one 256x18 color
lookup table and a triple loop frequency synthesizer, providing the read/write timing control for the Frame Buffer Memory and the
refresh of the TV/CRT display.
The integrated frequency synthesizer provides a 125MHz memory clock for high speed DRAM access and a 230MHz video clock
which supports various refresh rates up to 85Hz at 1280x1024.
Full Feature High Performance 3D Engine
The Apollo ProMedia Graphics Controller is equipped with an advanced Graphics Drawing, Single Cycle 3D Graphics Engine
that performs premium 3D functions at a high level of more than 1M triangles per second. The 3D engine supports Microsoft 
Direct3D. The 3D Engine is set up to off-load the CPU from major 3D tasks including slope calculation, sub-pixel positioning,
and Tri-striping. By balancing the 3D pipeline and reducing parameter passing, the Apollo ProMedia Graphics Controller
provides very high levels of performance. The 3D engine is integrated with a triangle set-up engine that sets up triangles
according to vertex input data and accomplishes various functions for 3D rendering. Gouraud shading provides smooth shading
for colors across surfaces, perspective correction texture mapping to correct texture data based on the perspective, bi-linear texture
filtering for interpolating, alpha blending to compensate colors for the opacity of two colors blended, Z-buffering (16-bit/24-bit),
video texturing to overlay 2D video play-back onto 3D images, fogging to simulate weather effects, palletized texture mapping (1-
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System Overview
VT8601 Apollo ProMedia
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, 4-, or 8-bit) for memory and bandwidth reduction, and anti-aliasing to reduce or eliminate jaggies resulted from alias rendering.
The 3D engine also works with the APM system, conserving power while 3D operations are suspended.
Video Processor
Video processor features include: on-chip hardware Color Space Conversion (CSC) for faster data conversion on the fly,
Horizontal/Vertical (H/V) scaling with interpolation, edge recovery algorithm logic, gamma correction, and overlay control with
different color depths from graphics. The Apollo ProMedia Graphics Controller also includes a fully integrated GUI accelerator,
read cache, and command FIFO that optimize memory bandwidth and maximize graphics performance.
The Apollo ProMedia Graphics Controller, with an integrated Video Display and a Capture Engine, supports dual apertures on the
PCI bus which enables independent graphic and video data to be transported simultaneously to and from different memory areas
TM
TM
and greatly accelerates the performance of both DirectDraw and DirectVideo . The Apollo ProMedia Graphics Controller can
provide dual video windows that display different images from different video sources (from the PCI bus and from the capture
port) on the same screen. The video image is stored in off-screen memory and is retrieved by the Video Display Processing block
for video processing. With the help of DirectDraw™ acceleration for sprites, page flipping, double buffering, and color keying,
video processing is performed by utilizing a proprietary edge recovery algorithm for sharper line visibility, de-interlacing, antitearing, multitap horizontal filtering, dithering, and scaling operations with bilinear interpolation in both horizontal and vertical
directions. Linear scaling permits zoom in/out to any size without any restrictions. In addition, the on-chip hardware Color Space
Conversion (CSC) accelerates conversion for 16 bit YUV pixels into linear true color 32 bit RGB pixels on the fly. The additional
X and Y minifiers are capable of shrinking video images to any linear fractions, which saves bus bandwidth and memory space.
The YUV planar logic of the Apollo ProMedia Graphics Controller supports a YUV 420 format that can eliminate redundant
video stream decoding procedures. The load of the CPU is reduced while performing software MPEG or software video
conferencing. The color and luminance control provided by the Apollo ProMedia Graphics Controller offers color compensations
to prevent color distortion for display devices such as a CRT or TV with Gamma correction and hue adjustment control.
The Video Conferencing feature allows remote and local video images to be displayed simultaneously on the same screen.
Video Capture and DVD
The Apollo ProMedia Graphics Controller has a Video Module Interface (VMI) and advanced hardware interface logic allowing it
to be directly connected to many MPEG and video decoders such as the C-Cube CL450/480, SGS 3400/3500, Philips 7110/1 and
Brooktree BT819/817/827/829.
The Apollo ProMedia Graphics Controller, integrated with a DVD video hardware block for motion compensation, gives existing
PCs the ability to play DVD video in MPEG-2 format at high bandwidths with very good video quality.
A new industry standard is being set for transmission of non-video data over a TV broadcast signal during vertical blanking dead
time. This technology is referred to as Intercast. The Apollo ProMedia Graphics Controller has the ability to take the entire video
stream over the video port, sending the visible video stream to the display memory for display in a window, stripping the VBI data
from the stream, and then sending this data to the CPU for processing using PCI Bus Mastering.
Versatile Frame Buffer Interface
The Apollo ProMedia Graphics Controller features a versatile frame buffer interface apperature into main system memory.
Optimized performance can be achieved with the single cycle memory bus interface using programmable DRAM timing. The
display queue has been increased to reduce the frequency of memory bus requests, optimizing memory bus efficiency for the
graphic controller.
With the support of the internal AGP apperature, the Apollo ProMedia Graphics Controller has access to system memory through
the GART. In the execute mode, the Apollo ProMedia Graphics Controller is able to use both the dedicated graphics portion and
the general portion of system memory for graphics operations. As a result, DVD and 3D rendering performance and quality are
greatly enhanced.
Hi-Res and Hi-Ref Display Support
Apollo ProMedia Graphics Controller display enhancements dramatically improve CRT resolution. These enhancements include
support of non-interlaced 1280x1024x64K, 1024x768x16M, 800x600x16M, and 640x480x16M colors for “full spectrum” color.
Extended text modes of 80 or 132 columns by 25, 30, 43, or 60 rows provide an extended graphics area frequently used in many
spreadsheet and database applications. Extended graphics and text modes are supported by software drivers that provide a “readyto-go” solution, minimizing the need for additional driver development.
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System Overview
VT8601 Apollo ProMedia
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A virtual screen can be created with the Apollo ProMedia Graphics Controller . When this function is enabled, a selected portion
of a large image can be shown on a smaller display. The image can also be moved across the whole screen, either up or down.
The Apollo ProMedia Graphics Controller is able to automatically detect DDC monitors with I2C signaling.
CRT Power Management (VESA DPMS)
The Apollo ProMedia Graphics Controller conforms to the standard power management schemes defined by VESA™ for CRTs.
The Apollo ProMedia Graphics Controller supports four states of VESA™ Display Power Management Signaling (DPMS), which
decrease monitor power consumption after timeout periods. VESA™ DPMS power down states (ready, standby, suspend, and
off) specify HSYNC and VSYNC signals to control the monitor power down state.
Flat Panel Interface
The Apollo ProMedia Flat Panel interface is designed to support industry standard TFT and STN panels. It can also be used to
drive external TMDS or LVDS transmitters. The interface supports both 18-bit and 24-bit display modes. Optionally, an 18+18
panel can be supported utilizing external latches.
Pin
PD[23]
PD[22]
PD[21]
PD[20]
PD[19]
PD[18]
PD[17]
PD[16]
PD[15]
PD[14]
PD[13]
PD[12]
PD[11]
PD[10]
PD[9]
PD[8]
PD[7]
PD[6]
PD[5]
PD[4]
PD[3]
PD[2]
PD[1]
PD[0]
24 Bit
Mode
B0
B1
G0
G1
R0
R1
B2
B3
G2
G3
R2
R3
B4
B5
B6
B7
G4
G5
G6
G7
R4
R5
R6
R7
18 Bit
Mode
S2
S1
Notes
S2 used for external 18+18
S1 used for external 18+18
B0
B1
G0
G1
R0
R1
B2
B3
B4
B5
G2
G3
G4
G5
F2
R3
R4
R5
Video Capture Interface
The Video Module Interface (VMI) is supported for video devices such as MPEG1 and MPEG2. Additionally, the zero-wait state
host write buffer, read cache, and memory mapped I/O increase operating speeds and contribute to peak performance levels. All
I/O interfaces are 5V tolerant, capable of interfacing with external devices operating at 5V, even though the Apollo ProMedia
Graphics Controller runs at 2.5V. Graphics system throughput is further enhanced by a command FIFO, allowing maximum bus
transfer speed for applications such as Windows™ or AutoCAD™ that directly access video memory.
Complete Hardware Compatibility
The Apollo ProMedia Graphics Controller is fully compliant with the VESA™ DDC and VAFC standards. The Apollo ProMedia
Graphics Controller is 100% VGA compatible at both the BIOS and Driver level, allowing full compatibility with virtually any
VGA application software. The Apollo ProMedia Graphics Controller provides hardware support to DirectDraw™, offering high
speed game graphics on Windows 98. The Apollo ProMedia Graphics Controller meets the requirements of PC99 as well,
supporting a unique ID for each customer and a unique ID for each model.
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System Overview
VT8601 Apollo ProMedia
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PINOUTS
Figure 1. VT8601 Ball Diagram (Top View)
Key
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
A
GND
RGB
NC
NC
NC
NC
HD62
HD57
HD63
GND
HD45
HD38
HD34
HD31
HD16
HD13
HD3
HD12
GND
CPU
RST#
HA18
HA20
HA22
HA10
HA28
HA3
GND
GND
NC
NC
NC
HD50
HD59
HD48
HD51
HD44
HD22
HD32
HD33
HD19
HD24
HD2
HD10
HD1
HA26
HA29
HA23
HA25
HA21
HA13
HA5
HA6
C
GND
S
VCC
S
RED
NC
NC
NC
HD60
HD55
GND
HD41
HD49
HD43
HD28
HD26
GND
HD20
HD9
HD5
HD4
GND
HA27
HA31
HA19
HA16
HA9
HA11
HA8
D
VCC
R
BLUE
GRN
GND
HD61
HD53
HD54
HD47
HD42
HD37
HD36
HD29
HD25
HD23
HD7
HD11
HD8
HD6
HD15
HA30
HA17
HA12
GND
HA4
HA14
BNR#
VTT
GTL
REF
HD35
HD21
CPU
RSTD#
HA7
HREQ
0#
HREQ
4#
BPRI#
VCC3
GND
GND
12
13
14
CPU
Pins
B
E
VSYNC HSYNC IRSET COMP
HD56
HD58
HD46
HD40
HD27
HD39
F
EVDD
SDA
SCL
ETST#
SUSP
GND
VCC3
HD52
VCCI
VCC3
G
EBLT
PD0
FLM
SCLK
LP
VCC3
G7
8
9
10
H
PD2
PD1
DE
PD5
EVEE
VCC3
H
CRT
J
PD4
PD3
PD8
PD7
PD11
VCCI
J
Pins
K
PD12
PD10
PD13
PD20
PD16
PD6
K
L
PD17
PD15
PD18
VCC3
PD9
PD14
L
M
PD23
IMIO
IMIIN
PD21
PD22
PD19
M
N
VD14
VD13
GND
VD15
VD12
GND
N
P
GND
VD9
VD10
VD11
VD8
GND
P
R
VD6
VD4
VD7
VD5#
VD3#
VD0#
R
T
VD2#
VD1#
VHS
VCC3
TVD4# TVD6#
U
VVS#
TVD7# VCLK#
TVD5
TVD2#
V
TVD0
TVD1
TVD3
TVCK
VCC
V1
VCC
V2
TVVS
AA
VCC
D
GND
V1
GND
V2
AB
W
Y
HD17
HD0
HA24
GND
VCC3
VCCI
VTT
VCC3
GND
HA15
16
17
18
19
G20
VCC3
HCLK
H
VCCA VCCA
J
VCCI
12
13
14
15
16
K17
K
VCC3
Panel
L
GND
VCC3
GND
GND
VCC3
GND
L
L
Pins
M
VCC3
GND
GND
GND
GND
VCC3
M
N
GND
GND
GND
GND
GND
GND
Video
P
GND
GND
GND
GND
GND
Pins
R
VCC3
GND
GND
GND
T
T
GND
VCC3
GND
VCC5
U
U10
11
12
13
TVHS
VCCI
V
TVout
XTLO
INTA#
VCC3
W
Pins
VLF1
XTLI
NC
VCC3
Y7
8
VLF2
NC
NC
NC
GND
VCC3
NC
NC
NC
NC
AD30
NC
REQ
6#
GNT
6#
GNT
3#
GNT
2#
GND
REQ
3#
REQ
2#
GNT
1#
GNT
0#
REQ
0#
REQ
1#
LOCK#
AD31
AD26
AD22
AD18
GND
SERR#
AD12
CBE0#
AD3
3
4
5
6
7
8
9
10
11
12
13
GND
Key
1
2
AE
HD18
11
AF
AD
15
HD14
K10
REQ
5#
GNT
5#
GNT
4#
REQ
4#
AC
11
HD30
GTL
REF
REQ
7#
GNT
7#
Revision 1.3 September 8, 1999
PCI
Pins
9
10
11
AD16
VCCI
VCC3
AD25
AD21
DEV
SEL#
PAR
CBE1#
AD29
AD24
AD23
AD17
IRDY#
AD28
CBE3#
GND
CBE2# TRDY#
AD27
AD20
AD19
FRM#
STOP#
DRDY# ADS#
BREQ
0#
GND
MD32
GNDA GNDA
MD33
MD35
MD3
MD2
M
GND
MD34
MD0
MD5
MD36
MD4
N
N
GND
MD39
MD37
MD7
MD38
MD6
GND
P
P
GND
MD12
MD8
MD41
MD9
MD40
GND
VCC3
R
R
MD44
MD10
MD43
MD11
MD42
GND
VCC3
GND
T
T
GND
MD15
MD13
MD46
MD14
MD45
14
15
16
U17
Mem
U
VCC3
SCAS
A#
Pins
V
VCCI
VSUS3
W
RAS
5#
VSUS3
17
18
19
Y20
VCC3
RAS
4#
VCC3
VCCI
MD58
VCC3
GND
VSUS2
SWEC#
MD47 SWEA# SWEB#
CKE2 CKE0
CAS SCASC# SCASB# GND
0#
CKE1 CKE3
CAS
CAS
CAS
GND
1#
5#
4#
RAS
RAS
RAS
RAS
3#
2#
1#
0#
SRAS SRASB# SRASC#
MA0
A#
CKE5 CKE4
MD63
MD29
MD56
MD54
MD20
MD18
VSUS3
MA1
MA4
MA3
MA2
PREQ#
MD31
MD60
MD25
MD23
MD52
MD49
SUST#
GND
MA7
MA6
MA5
PWR
OK
PGNT#
MD61
MD27
MD57
GND
MD21
MD50
MD16
MA9
MA8
AD1
MA12
MD62
MD28
GND
MD24
MD53
MD51
MD17
CAS
2#
MA13
BA0
MA14
BA1
MA10
AD0
CAS
6#
CAS
3#
CAS
7#
MA11
PCI
RST#
PCK
RUN#
14
15
16
17
18
19
20
21
22
23
24
25
26
GND
GND
GND
AD10
AD7
AD5
PCLK
AD15
AD11
AD6
AD4
AD14
AD9
GND
-12-
DBSY#
MD1
15
AD2
RS2#
PLLTST
14
AD8
GND
RS0#
RS1#
13
AD13
12
MCLK
O
MCLK
I
HREQ HREQ HREQ
DE1#
2#
3#
FER#
H
H
LOCK# HIT# TRDY# HITM#
16
MD30
MD59
MD26
MD55
MD22
MD19
MD48
GND
Pinouts
VT8601 Apollo ProMedia
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Figure 2. VT8601 Pin List (Numerical Order) – Using DFP, TVout, & Video Capture Ports
Pin #
Pin Name Pin #
Pin Name
Pin #
Pin Name
Pin #
Pin Name
A01 P GNDRGB
D02 A BLUE
G05 O LP
N26 IO MD06
A02 IO NC
D03 A GRN
G06 P VCC3
P01 P GND
A03 IO NC
D04 P GND
G21 P VCC3
P02 IO VD09
A04 IO NC
D05 IO HD61
G22 I HCLK
P03 IO VD10
A05 IO NC
D06 IO HD53
G23 I HLOCK#
P04 IO VD11
A06 IO HD62
D07 IO HD54
G24 IO HIT#
P05 IO VD08
A07 IO HD57
D08 IO HD47
G25 IO HTRDY#
P06 P GND
A08 IO HD63
D09 IO HD42
G26 I HITM#
P21 P GND
A09 P GND
D10 IO HD37
H01 O PD02
P22 IO MD12
A10 IO HD45
D11 IO HD36
H02 O PD01
P23 IO MD08
A11 IO HD38
D12 IO HD29
H03 O DE
P24 IO MD41
A12 IO HD34
D13 IO HD25
H04 O PD05
P25 IO MD09
A13 IO HD31
D14 IO HD23
H05 O EVEE /
P26 IO MD40
A14 IO HD16
D15 IO HD07
H06 P VCC3
R01 IO VD06
A15 IO HD13
D16 IO HD11
H21 P VCCA
R02 IO VD04
A16 IO HD03
D17 IO HD08
H22 P VCCA
R03 IO VD07
A17 IO HD12
D18 IO HD06
H23 IO RS0#
R04 IO VD05#
A18 P GND
D19 IO HD15
H24 P GND
R05 IO VD03#
A19 O CPURST#
D20 IO HA30
H25 IO RS2#
R06 IO VD00#
A20 IO HA18
D21 IO HA17
H26 IO DBSY#
R22 IO MD44
A21 IO HA20
D22 IO HA12
J01 O PD04
R23 IO MD10
A22 IO HA22
D23 P GND
J02 O PD03
R24 IO MD43
A23 IO HA10
D24 IO HA04
J03 O PD08
R25 IO MD11
A24 IO HA28
D25 IO HA14
J04 O PD07
R26 IO MD42
A25 IO HA03
D26 IO BNR#
J05 O PD11
T01 IO VD02
A26 P GND
E01 O VSYNC
J06 P VCCI
T02 IO VD01
B01 P GNDS
E02 O HSYNC
J21 P VCCI
T03 IO VHS
B02 P GND
E03 A IRSET
J22 O MCLKO
T04 P VCC3
B03 IO NC
E04 A COMP
J23 IO DRDY#
T05 O TVD4
B04 IO NC
E05 IO HD56
J24 IO ADS#
T06 O TVD6
B05 IO NC
E06 IO HD58
J25 O BREQ0#
T21 P GND
B06 IO HD50
E07 IO HD46
J26 P GND
T22 IO MD15
B07 IO HD59
E08 IO HD40
K01 O PD12
T23 IO MD13
B08 IO HD48
E09 IO HD27
K02 O PD10
T24 IO MD46
B09 IO HD51
E10 IO HD39
K03 O PD13
T25 IO MD14
B10 IO HD44
E11 P VTT
K04 O PD20
T26 IO MD45
B11 IO HD22
E12 P GTLREF
K05 O PD16
U01 IO VVS
B12 IO HD32
E13 IO HD35
K06 O PD06
U02 O TVD7
B13 IO HD33
E14 IO HD21
K21 P VCC3
U03 IO VCLK
B14 IO HD19
E15 IO HD30
K22 I MCLKI
U04 O TVD5
B15 IO HD24
E16 IO HD14
K23 IO RS1#
U05 O TVD2
B16 IO HD02
E17 IO HD18
K24
PLLTST
U06 P VCC5
B17 IO HD10
E18 IO HD17
K25 IO MD01
U21 P VCC3
B18 IO HD01
E19 IO HD00
K26 IO MD32
U22 O SCASA#
B19 IO HA26
E20 IO HA24
L01 O PD17
U23 IO MD47
B20 IO HA29
E21 P GTLREF
L02 O PD15
U24 O SWEA#/MWEA#
B21 IO HA23
E22 O CPURSTD#
L03 O PD18
U25 O SWEB#/MWEB# / CKE2
B22 IO HA25
E23 IO HA07
L04 P VCC3
U26 O SWEC#/MWEC# / CKE0
B23 IO HA21
E24 IO HREQ0#
L05 O PD09
V01 O TVD0
B24 IO HA13
E25 IO HREQ4#
L06 O PD14
V02 O TVD1
B25 IO HA05
E26 IO BPRI#
L21 P GNDA
V03 O TVD3
B26 IO HA06
F01 O EVDD
L22 P GNDA
V04 O TVCLK
C01 P VCCS
F02 IO SDA
L23 IO MD33
V05 O TVHS
C02 A RED
F03 IO SCL
L24 IO MD35
V06 P VCCI
C03 IO NC
F04 I ETST#
L25 IO MD03
V21 P VCCI
V22 P VSUS3
C04 IO NC
F05 I SUSP
L26 IO MD02
C05 IO NC
F06 P GND
M01 O PD23
V23 O CAS0# / DQM0
C06 IO HD60
F07 P VCC3
M02 O IMIO
V24 O SCASC# / CKE1
C07 IO HD55
F08 IO HD52
M03 I IMIIN
V25 O SCASB# / CKE3
C08 P GND
F09 P VCCI
M04 O PD21
V26 P GND
F10 P VCC3
W01 P VCCD
C09 IO HD41
M05 O PD22
C10 IO HD49
F12 P VCC3
M06 O PD19
W02 P VCCV1
C11 IO HD43
F13 P GND
M21 P GND
W03 O TVVS
C12 IO HD28
F14 P GND
M22 IO MD34
W04 O XLTO
F16 P GND
C13 IO HD26
M23 IO MD00
W05 O INTA#
C14 P GND
F17 P VCC3
M24 IO MD05
W06 P VCC3
C15 IO HD20
F18 P VCCI
M25 IO MD36
W21 O RAS5# / CS5#
F19 P VTT
W22 P VSUS3
C16 IO HD09
M26 IO MD04
F20 P VCC3
C17 IO HD05
N01 IO VD14
W23 O CAS1# / DQM1
C18 IO HD04
F21 P GND
N02 IO VD13
W24 P GND
C19 P GND
F22 IO HA15
N03 P GND
W25 O CAS5# / DQM5
C20 IO HA27
F23 IO HREQ1#
N04 IO VD15
W26 O CAS4# / DQM4
C21 IO HA31
F24 IO HREQ2#
N05 IO VD12
Y01 P GNDV1
N06 P GND
Y02 P VCCV2
C22 IO HA19
F25 IO HREQ3#
C23 IO HA16
F26 IO DEFER#
N21 P GND
Y03 A VLF1
C24 IO HA09
G01 O EBLT
N22 IO MD39
Y04 I XLTI
C25 IO HA11
G02 O PD00
N23 IO MD37
Y05 IO NC
Y06 P VCC3
C26 IO HA08
G03 O FLM
N24 IO MD07
D01 P VCCR
Y21 P VCC3
G04 O SCLK
N25 IO MD38
Center GND Pins (28 pins): L11, L13-14, L16, M12-15, N11-16, P11-16, R12-15, T11, T13-14, T16
Center VCC3 Pins (8 pins): L12, L15, M11, M16, R11, R16, T12, T15
Revision 1.3 September 8, 1999
-13-
Pin #
Y22
Y23
Y24
Y25
Y26
AA01
AA02
AA03
AA04
AA05
AA06
AA07
AA08
AA09
AA10
AA13
AA14
AA15
AA17
AA18
AA19
AA20
AA21
AA22
AA23
AA24
AA25
AA26
AB01
AB02
AB03
AB04
AB05
AB06
AB07
AB08
AB09
AB10
AB11
AB12
AB13
AB14
AB15
AB16
AB17
AB18
AB19
AB20
AB21
AB22
AB23
AB24
AB25
AB26
AC01
AC02
AC03
AC04
AC05
AC06
AC07
AC08
AC09
AC10
AC11
AC12
AC13
AC14
AC15
AC16
AC17
AC18
AC19
AC20
AC21
AC22
AC23
AC24
AC25
O
O
O
O
O
P
A
IO
IO
IO
P
P
IO
P
P
P
P
P
P
P
IO
P
P
P
O
O
O
O
IO
IO
IO
IO
O
IO
IO
IO
IO
IO
IO
IO
IO
IO
I
IO
IO
IO
IO
IO
IO
P
O
O
O
O
IO
IO
IO
P
I
IO
IO
IO
IO
IO
IO
IO
IO
IO
I
IO
IO
IO
IO
IO
IO
I
P
O
O
Pin Names
Pin #
RAS4# / CS4#
RAS3# / CS3#
RAS2# / CS2#
RAS1# / CS1#
RAS0# / CS0#
GNDV2
VLF2
NC
NC
NC
GND
VCC3
AD16
VCCI
VCC3
GND
GND
GND
VCC3
VCCI
MD58
VCC3
GND
VSUS2
MA00 / strap
SRASA#
SRASB# / CKE5
SRASC# / CKE4
NC
NC
NC
NC
GNT0#
AD30
AD25
AD21
DEVSEL#
PAR
CBE1#
AD10
AD07
AD05
PCLK
MD63
MD29
MD56
MD54
MD20
MD18
VSUS3
MA01 / strap
MA04 / strap
MA03 / strap
MA02 / strap
NC
REQ5#
REQ6#
GND
REQ0#
AD29
AD24
AD23
AD17
IRDY#
AD15
AD11
AD06
AD04
PREQ#
MD31
MD60
MD25
MD23
MD52
MD49
SUST#
GND
MA07 / strap
MA06 / strap
AC26
AD01
AD02
AD03
AD04
AD05
AD06
AD07
AD08
AD09
AD10
AD11
AD12
AD13
AD14
AD15
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
AE01
AE02
AE03
AE04
AE05
AE06
AE07
AE08
AE09
AE10
AE11
AE12
AE13
AE14
AE15
AE16
AE17
AE18
AE19
AE20
AE21
AE22
AE23
AE24
AE25
AE26
AF01
AF02
AF03
AF04
AF05
AF06
AF07
AF08
AF09
AF10
AF11
AF12
AF13
AF14
AF15
AF16
AF17
AF18
AF19
AF20
AF21
AF22
AF23
AF24
AF25
AF26
Pin Name
O
IO
IO
IO
I
I
IO
IO
P
IO
IO
IO
IO
P
I
O
IO
IO
IO
P
IO
IO
IO
O
O
O
O
IO
O
O
I
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
I
IO
IO
IO
IO
IO
IO
IO
O
O
O
O
P
I
O
O
IO
IO
IO
IO
P
IO
IO
IO
IO
IO
IO
IO
IO
P
IO
IO
IO
IO
O
O
O
P
MA05 / strap
REQ7#
GNT5#
GNT6#
REQ3#
REQ1#
AD28
CBE3#
GND
CBE2#
TRDY#
AD14
AD09
GND
PWROK
PGNT#
MD61
MD27
MD57
GND
MD21
MD50
MD16
CAS6# / DQM6
MA11 / strap
MA09 / strap
MA08 / strap
GNT7#
GNT4#
GNT3#
REQ2#
LOCK#
AD27
AD20
AD19
FRAME#
STOP#
AD13
AD08
AD02
AD01
RESET#
MD30
MD59
MD26
MD55
MD22
MD19
MD48
CAS3# / DQM3
MA12 / strap
MA13 / strap
MA10 / strap
GND
REQ4#
GNT2#
GNT1#
AD31
AD26
AD22
AD18
GND
SERR#
AD12
CBE0#
AD03
AD00
PCKRUN#
MD62
MD28
GND
MD24
MD53
MD51
MD17
CAS7# / DQM7
CAS2# / DQM2
MA14 / strap
GND
Pinouts
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Figure 3. VT8601 Pin List (Alphabetical Order)
Pin #
Pin Name
AF14 IO AD00
AE14 IO AD01
AE13 IO AD02
AF13 IO AD03
AC14 IO AD04
AB14 IO AD05
AC13 IO AD06
AB13 IO AD07
AE12 IO AD08
AD12 IO AD09
AB12 IO AD10
AC12 IO AD11
AF11 IO AD12
AE11 IO AD13
AD11 IO AD14
AC11 IO AD15
AA08 IO AD16
AC09 IO AD17
AF08 IO AD18
AE08 IO AD19
AE07 IO AD20
AB08 IO AD21
AF07 IO AD22
AC08 IO AD23
AC07 IO AD24
AB07 IO AD25
AF06 IO AD26
AE06 IO AD27
AD06 IO AD28
AC06 IO AD29
AB06 IO AD30
AF05 IO AD31
J24 IO ADS#
D02 A BLUE
D26 IO BNR#
E26 IO BPRI#
J25 O BREQ0#
V23 O CAS0# / DQM0
W23 O CAS1# / DQM1
AF24 O CAS2# / DQM2
AE23 O CAS3# / DQM3
W26 O CAS4# / DQM4
W25 O CAS5# / DQM5
AD23 O CAS6# / DQM6
AF23 O CAS7# / DQM7
AF12 IO CBE0#
AB11 IO CBE1#
AD09 IO CBE2#
AD07 IO CBE3#
E04 A COMP
A19 O CPURST#
E22 O CPURSTD#
H26 IO DBSY#
H03 O DE / GMD11
F26 IO DEFER#
AB09 IO DEVSEL#
J23 IO DRDY#
G01 O EBLT
F04 I ETST#
F01 O EVDD
H05 O EVEE
G03 O FLM
AE09 IO FRAME#
A09 P GND
A18 P GND
A26 P GND
B02 P GND
C08 P GND
C14 P GND
C19 P GND
D04 P GND
D23 P GND
F06 P GND
F13 P GND
F14 P GND
F16 P GND
F21 P GND
H24 P GND
J26 P GND
Center GND Pins (28 pins):
Center VCC3 Pins (8 pins):
Pin #
Pin Name Pin #
Pin Name
Pin #
Pin Name
D17 IO HD08
AC25 O MA06 / strap
M21 P GND
C16 IO HD09
AC24 O MA07 / strap
N03 P GND
B17 IO HD10
AD26 O MA08 / strap
N06 P GND
D16 IO HD11
AD25 O MA09 / strap
N21 P GND
A17 IO HD12
AE26 O MA10 / strap
P01 P GND
A15 IO HD13
AD24 O MA11 / strap
P06 P GND
E16 IO HD14
AE24 O MA12 / strap
P21 P GND
D19 IO HD15
AE25 O MA13 / strap
T21 P GND
A14 IO HD16
AF25 O MA14 / strap
V26 P GND
E18 IO HD17
K22 I MCLKI
W24 P GND
E17 IO HD18
J22 O MCLKO
AA06 P GND
B14 IO HD19
M23 IO MD00
AA13 P GND
C15 IO HD20
K25 IO MD01
AA14 P GND
E14 IO HD21
L26 IO MD02
AA15 P GND
B11 IO HD22
L25 IO MD03
AA21 P GND
D14 IO HD23
M26 IO MD04
AC04 P GND
B15 IO HD24
M24 IO MD05
AC23 P GND
D13 IO HD25
N26 IO MD06
AD08 P GND
C13 IO HD26
N24 IO MD07
AD13 P GND
E09 IO HD27
P23 IO MD08
AD19 P GND
C12 IO HD28
P25 IO MD09
AF01 P GND
D12 IO HD29
R23 IO MD10
AF09 P GND
E15 IO HD30
R25 IO MD11
AF18 P GND
A13 IO HD31
P22 IO MD12
AF26 P GND
B12 IO HD32
T23 IO MD13
L21 P GNDA
B13 IO HD33
T25 IO MD14
L22 P GNDA
A12 IO HD34
T22 IO MD15
A01 P GNDRGB
E13 IO HD35
AD22 IO MD16
B01 P GNDS
D11 IO HD36
AF22 IO MD17
Y01 P GNDV1
D10 IO HD37
AB21 IO MD18
AA01 P GNDV2
AB05 O GNT0#
A11 IO HD38
AE21 IO MD19
AF04 O GNT1#
E10 IO HD39
AB20 IO MD20
AF03 O GNT2#
E08 IO HD40
AD20 IO MD21
AE03 O GNT3#
C09 IO HD41
AE20 IO MD22
AE02 O GNT4#
D09 IO HD42
AC19 IO MD23
AD02 O GNT5#
C11 IO HD43
AF19 IO MD24
AD03 O GNT6#
B10 IO HD44
AC18 IO MD25
AE01 O GNT7#
A10 IO HD45
AE18 IO MD26
D03 A GRN
E07 IO HD46
AD17 IO MD27
D08 IO HD47
AF17 IO MD28
E12 P GTLREF
B08 IO HD48
AB17 IO MD29
E21 P GTLREF
A25 IO HA03
C10 IO HD49
AE16 IO MD30
D24 IO HA04
B06 IO HD50
AC16 IO MD31
B25 IO HA05
B09 IO HD51
K26 IO MD32
B26 IO HA06
F08 IO HD52
L23 IO MD33
E23 IO HA07
D06 IO HD53
M22 IO MD34
C26 IO HA08
D07 IO HD54
L24 IO MD35
C24 IO HA09
C07 IO HD55
M25 IO MD36
A23 IO HA10
E05 IO HD56
N23 IO MD37
C25 IO HA11
A07 IO HD57
N25 IO MD38
D22 IO HA12
E06 IO HD58
N22 IO MD39
B24 IO HA13
B07 IO HD59
P26 IO MD40
D25 IO HA14
C06 IO HD60
P24 IO MD41
F22 IO HA15
D05 IO HD61
R26 IO MD42
C23 IO HA16
A06 IO HD62
R24 IO MD43
D21 IO HA17
A08 IO HD63
R22 IO MD44
A20 IO HA18
G24 IO HIT#
T26 IO MD45
C22 IO HA19
G26 I HITM#
T24 IO MD46
A21 IO HA20
G23 I HLOCK#
U23 IO MD47
B23 IO HA21
E24 IO HREQ0#
AE22 IO MD48
A22 IO HA22
F23 IO HREQ1#
AC21 IO MD49
B21 IO HA23
F24 IO HREQ2#
AD21 IO MD50
E20 IO HA24
F25 IO HREQ3#
AF21 IO MD51
B22 IO HA25
E25 IO HREQ4#
AC20 IO MD52
B19 IO HA26
E02 O HSYNC
AF20 IO MD53
C20 IO HA27
G25 IO HTRDY#
AB19 IO MD54
A24 IO HA28
M02 O IMIO
AE19 IO MD55
B20 IO HA29
M03 I IMIIN
AB18 IO MD56
D20 IO HA30
W05 O INTA#
AD18 IO MD57
C21 IO HA31
AC10 IO IRDY#
AA19 IO MD58
G22 I HCLK
E03 A IRSET
AE17 IO MD59
E19 IO HD00
AE05 IO LOCK#
AC17 IO MD60
B18 IO HD01
G05 O LP
AD16 IO MD61
B16 IO HD02
AA23 O MA00 / strap AF16 IO MD62
A16 IO HD03
AB23 O MA01 / strap AB16 IO MD63
C18 IO HD04
AB26 O MA02 / strap
A02 - NC
C17 IO HD05
AB25 O MA03 / strap
A03 - NC
D18 IO HD06
AB24 O MA04 / strap
A04 - NC
D15 IO HD07
AC26 O MA05 / strap
A05 - NC
L11, L13-14, L16, M12-15, N11-16, P11-16, R12-15, T11, T13-14, T16
L12, L15, M11, M16, R11, R16, T12, T15
Revision 1.3 September 8, 1999
-14-
Pin #
B03
B04
B05
C03
C04
C05
Y05
AA03
AA04
AA05
AB01
AB02
AB03
AB04
AC01
AB10
AF15
AB15
G02
H02
H01
J02
J01
H04
K06
J04
J03
L05
K02
J05
K01
K03
L06
L02
K05
L01
L03
M06
K04
M04
M05
M01
AD15
K24
AC15
AD14
Y26
Y25
Y24
Y23
Y22
W21
C02
AC05
AD05
AE04
AD04
AF02
AC02
AC03
AD01
AE15
H23
K23
H25
U22
V25
V24
G04
F03
F02
AF10
AA24
AA25
AA26
AE10
F05
AC22
U24
IO
IO
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
I
O
O
O
O
O
O
A
I
I
I
I
I
I
I
I
I
IO
IO
IO
O
O
O
O
IO
IO
IO
O
O
O
IO
I
I
O
Pin Names
Pin #
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
PAR
PCKRUN#
PCLK
PD00
PD01
PD02
PD03
PD04
PD05
PD06
PD07
PD08
PD09
PD10
PD11
PD12
PD13
PD14
PD15
PD16
PD17
PD18
PD19
PD20
PD21
PD22
PD23
PGNT#
PLLTST
PREQ#
PWROK
RAS0# / CS0#
RAS1# / CS1#
RAS2# / CS2#
RAS3# / CS3#
RAS4# / CS4#
RAS5# / CS5#
RED
REQ0#
REQ1#
REQ2#
REQ3#
REQ4#
REQ5#
REQ6#
REQ7#
RESET#
RS0#
RS1#
RS2#
SCASA#
SCASB# / CKE3
SCASC# / CKE1
SCLK
SCL
SDA
SERR#
SRASA#
SRASB# / CKE5
SRASC# / CKE4
STOP#
SUSP
SUST#
SWEA# / MWEA#
U25
U26
AD10
V04
V01
V02
U05
V03
T05
U04
T06
U02
V05
W03
F07
F10
F12
F17
F20
G06
G21
H06
K21
L04
T04
U21
W06
Y06
Y21
AA07
AA10
AA17
AA20
U06
H21
H22
W01
F09
F18
J06
J21
V06
V21
AA09
AA18
D01
C01
W02
Y02
U03
R06
T02
T01
R05
R02
R04
R01
R03
P05
P02
P03
P04
N05
N02
N01
N04
T03
Y03
AA02
AA22
V22
W22
AB22
E01
E11
F19
U01
Y04
W04
Pin Name
O
O
IO
O
O
O
O
O
O
O
O
O
O
O
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
IO
A
A
P
P
P
P
O
P
P
IO
I
O
SWEB#/MWEB# / CKE2
SWEC#/MWEC# / CKE0
TRDY#
TVCLK
TVD0
TVD1
TVD2
TVD3
TVD4
TVD5
TVD6
TVD7
TVHS
TVVS
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC3
VCC5
VCCA
VCCA
VCCD
VCCI
VCCI
VCCI
VCCI
VCCI
VCCI
VCCI
VCCI
VCCR
VCCS
VCCV1
VCCV2
VCLK
VD00
VD01
VD02
VD03
VD04
VD05
VD06
VD07
VD08
VD09
VD10
VD11
VD12
VD13
VD14
VD15
VHS
VLF1
VLF2
VSUS2
VSUS3
VSUS3
VSUS3
VSYNC
VTT
VTT
VVS
XLTI
XLTO
Pinouts
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PIN DESCRIPTIONS
Table 1. VT8601 Pin Descriptions
CPU Interface
Signal Name
Pin #
I/O
see pin list
IO
Signal Description
Host Address Bus. Connect to the address bus of the host CPU. These pins are inputs
during CPU cycles, but are driven by the VT8601 during cache snooping operations.
see pin list IO Host CPU Data. These signals are connected to the CPU data bus.
HD[63:0]#
J24
IO Address Strobe. The CPU asserts ADS# in T1 of the CPU bus cycle.
ADS#
D26
IO Block Next Request. Used to block the current request bus owner from issuing new
BNR#
requests. This signal is used to dynamically control the processor bus pipeline depth.
E26
IO Priority Agent Bus Request. The owner of this signal will always be the next bus owner.
BPRI#
This signal has priority over symmetric bus requests and causes the current symmetric
owner to stop issuing new transactions unless the HLOCK# signal is asserted. The
VT82C693 drives this signal to gain control of the processor bus.
H26
IO Data Bus Busy. Used by the data bus owner to hold the data bus for transfers requiring
DBSY#
more than one cycle.
F26
IO Defer. The VT8601 uses a dynamic deferring policy to optimize system performance. The
DEFER#
VT8601 also uses the DEFER# signal to indicate a processor retry response.
J23
IO Data Ready. Asserted for each cycle that data is transferred.
DRDY#
G24
IO Hit. Indicates that a cacheing agent holds an unmodified version of the requested line.
HIT#
Also driven in conjunction with HITM# by the target to extend the snoop window.
G26
I
HITM#
Hit Modified. Asserted by the CPU to indicate that the address presented with the last
assertion of EADS# is modified in the L1 cache and needs to be written back.
G23
I
HLOCK#
Host Lock. All CPU cycles sampled with the assertion of HLOCK# and ADS# until the
negation of HLOCK# must be atomic.
J25
O Bus Request 0. Bus request output to CPU.
BREQ0#
E25, F25,
IO Request Command. Asserted during both clocks of the request phase. In the first clock,
HREQ[4:0]#
F24, F23,
the signals define the transaction type to a level of detail that is sufficient to begin a snoop
E24
request. In the second clock, the signals carry additional information to define the complete
transaction type.
G25
IO Host Target Ready. Indicates that the target of the processor transaction is able to enter
HTRDY#
the data transfer phase.
H25, K23,
IO Response Signals. Indicates the type of response per the table below:
RS[2:0]#
H23
RS[2:0]# Response type
000
Idle State
001
Retry Response
010
Defer Response
011
Reserved
100
Hard Failure
101
Normal Without Data
110
Implicit Writeback
111
Normal With Data
A19
O
CPURST#
CPU Reset. Reset output to CPU
E22
O CPU Reset Delayed. CPU Reset output delayed by 2T.
CPURSTD#
Note: Clocking of the CPU and cache interfaces is performed with HCLK; see the clock pin group at the end of the pin
descriptions section for descriptions of the clock input pins.
Note: All signals above require 4.7K pullups to VCC3 except EADS#, HITM#, AHOLD, HA, and HD.
Note: All signals above connect directly to the host CPU except HA and HD which connect directly to the L2 cache SRAMs and
connect to the host CPU through 22 ohm series resistors (see the “Apollo ProMedia Design Guide” for more information).
HA[31:3]#
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DRAM Interface
Signal Name
MD[63:0]
MA[14:0]
/ Strap Options
CKE5# / SRASB#,
CKE4# / SRASC#,
CKE3# / SCASB#,
CKE2# / SWEB#,
CKE1# / SCASC#,
CKE0# / SWEC#
RAS[5-0]# / CS[5-0]#
Pin #
I/O
Signal Description
see pin list
IO
AF25, AE25,
AE24, AD24,
AE26, AD25,
AD26, AC24,
AC25, AC26,
AB24, AB25,
AB26, AB23,
AA23
O/I
AA25,
AA26,
V25,
U25,
V24,
U26
W21, Y22,
Y23, Y24,
Y25, Y26
IO
Memory Data. These signals are connected to the DRAM data bus.
Note: MD0 is internally pulled up for use in EDO memory type
detection.
Memory Address. DRAM address lines. These pins are also used for
power-up strapping options (sampled on the rising edge of RESET#):
MA14,12 Rx68[1-0] CPU FSB Freq (0=66, 1=100, 2=auto, 3=133)
MA13
Rx52[7] GTL I/O Buffer Pullup (0=Disable, 1=Enable)
MA11
In-order Queue Depth (0=1-level, 1=4-level)
MA10-9
North Bridge Clock Delay (0-3 Clocks)
MA8, 6
Graphics Clock Select (0=Normal, 1-3=Test)
MA7
Graphics Test Mode (0=Normal, 1=Test)
MA5
LCD Output (0=Off, 1=On)
MA4-2
Panel Type (0-3=TFT, 4-7=DSTN)
MA1-0
Graphics Clock Delay (0-3 Clocks)
All pins have internal pull-downs for default low (0).
Strap 1 using 4.7KΩ TO VCC3.
SDRAM Clock Enable. Clock enables 5-0 may be connected to the
DRAM modules in any order. Each DRAM module requires 2 clock
enables.
Note: These pins are powered by VSUS
O
Multifunction Pins
1. FPG/EDO DRAM: Row Address Strobe of each bank.
2. Synchronous DRAM: Chip select of each bank.
Note: These pins are powered by VSUS.
AF23, AD23,
O
CAS#[7:0] / DQM[7:0]
Multifunction Pins
1. FPG/EDO DRAM: Column Address Strobe of each byte lane.
W25, W26,
2. Synchronous DRAM: Data mask of each byte lane.
AE23, AF24,
Note: These pins are powered by VSUS.
W23, V23
AA24,
O
SRASA#,
Row Address Command Indicator. For support of up to three
AA25,
Synchronous DRAM DIMM slots (these are copies of the same logical
SRASB# / CKE5,
AA26
SRASC# / CKE4
signal). “A” controls banks 0-1 (module 0), “B” controls banks 2-3
(module 1), and “C” controls banks 4-5 (module 2).
U22,
O
SCASA#,
Column Address Command Indicator. For support of up to three
V25,
Synchronous DRAM DIMM slots (these are copies of the same logical
SCASB# / CKE3
V24
SCASC# / CKE1
signal). “A” controls banks 0-1 (module 0), “B” controls banks 2-3
(module 1), and “C” controls banks 4-5 (module 2).
U24,
O
SWEA# / MWEA#,
Write Enable Command Indicator. For support of up to three
U25,
Synchronous DRAM DIMM slots (these are copies of the same logical
SWEB# / MWEB# / CKE2,
U26
SWEC# / MWEC# / CKE0
signal). Multifunction pins, used as MWE# pins for FPG/EDO
memory. “A” controls banks 0-1 (module 0), “B” controls banks 2-3
(module 1), and “C” controls banks 4-5 (module 2). Note: These pins
are powered by VSUS.
Note: Clocking of the memory subsystem uses memory clock (MCLK); see the clock pin group at the end of the pin descriptions
section for descriptions of the clock pins.
Note: Connect all memory interface pins except MD to the DRAM modules through 22Ω series resistors (see the Apollo ProMedia
Design Guide” for more specific connection details and PCB layout recommendations).
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PCI Bus Interface
Signal Name
Pin #
I/O
see pin list
IO
Signal Description
Address/Data Bus. The standard PCI address and data lines. The address is
driven with FRAME# assertion and data is driven or received in following
cycles.
AD7, AD9, AB11,
IO Command/Byte Enables. Commands are driven with FRAME# assertion.
CBE[3:0]#
AF12
Byte enables corresponding to supplied or requested data are driven on
following clocks.
AB10
IO Parity. A single parity bit is provided over AD[31:0] and C/BE[3:0].
PAR
AE9
IO Frame. Assertion indicates the address phase of a PCI transfer. Negation
FRAME#
indicates that one more data transfer is desired by the cycle initiator. 10KΩ
pullup to VCC3.
AC10
IO Initiator Ready. Asserted when initiator is ready for data transfer. 10KΩ
IRDY#
pullup to VCC3.
AD10
IO Target Ready. Asserted when target is ready for data transfer. 10KΩ pullup to
TRDY#
VCC3.
AE10
IO Stop. Asserted by the target to request the master to stop the current
STOP#
transaction. 10KΩ pullup to VCC3.
AB9
IO Device Select. This signal is driven by the ProMedia when a PCI initiator is
DEVSEL#
attempting to access main memory. It is an input when the ProMedia is acting
as a PCI initiator. 10KΩ pullup to VCC3.
AE5
IO Lock. Used to establish, maintain, and release resource lock. 10KΩ pullup to
LOCK#
VCC3.
AF10
IO System Error. The ProMedia will pulse this signal when it detects a system
SERR#
error condition (10KΩ pullup to VCC3).
AC15
I
PREQ#
South Bridge Request. This signal comes from the South Bridge. PREQ# is
the South Bridge request for the PCI bus. 10KΩ pullup to VCC3.
AD15
O
PGNT#
South Bridge Grant. This signal driven by the ProMedia to grant PCI access
to the South Bridge. 10KΩ pullup to VCC3.
AD1, AC3, AC2, AF2,
I
REQ[7:0]#
PCI Master Request. PCI master requests for use of the PCI bus. 2.2KΩ
AD4, AE4, AD5, AC5
pullup to VCC5.
AE1, AD3, AD2, AE2,
O
GNT[7:0]#
PCI Master Grant. Permission is given to the master to use the PCI bus.
AE3, AF3, AF4, AB5
2.2KΩ pullup to VCC3.
W5
O
INTA#
PCI Interrupt Out. INTA# is an asynchronous active low output used to
signal an event that requires handling. It is driven by the integrated graphics
controller.
Note: Clocking of the PCI interface is performed with PCLK; see the clock pin group at the end of the pin descriptions section for
descriptions of the clock input pins.
AD[31:0]
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Clock / Reset Control
Signal Name
Pin #
I/O
HCLK
G22
I
MCLKI
K22
I
MCLKO
J22
O
PCLK
AB15
I
PCKRUN#
AF15
IO
XLTI
Y4
I
XLTO
W4
O
RESET#
AE15
I
CPURST#
CPURSTD#
PWROK
SUST#
A19
E22
AD14
AC22
O
O
I
I
F5
I
SUSP
Signal Description
Host Clock. This pin receives the host CPU clock. This clock is used by all logic in
the host CPU domain. It is driven by the external clock synthesizer.
Memory Clock In. This clock is used by internal clock logic to maintain the proper
phase relationship with MCLKO. It is driven by the external clock synthesizer.
Memory Clock Out. Created on-chip from MCLKI and used by the memory controller
as a timing reference for creation of all memory timing sequences. It is connected to the
external clock chip for use in maintaining proper phase relationships.
PCI Clock. This clock is used by all on-chip logic in the PCI clock domain. This input
must be 33 MHz maximum to comply with PCI specification requirements and must be
synchronous with the host CPU clock (HCLK) with an HCLK:PCLK frequency ratio of
2:1 (66MHz CPU clock) or 3:1 (100 MHz CPU clock). The PCI clock needs to be
controlled to within 1.5 ± 0.5 nsec relative to the host CPU clock (CPU leads).
PCI Clock Run. For implementation of PCI bus clock control for low-power PCI bus
operation. Refer to the “PCI Mobile Design Guidelines” and “Apollo ProMedia Design
Guide” documents for additional information.
Crystal Input. 14.31818 MHz for the video clock synthesizer reference. Connect to a
14.31818 MHz clock source if a crystal not used. Connect to main ground plane GND
with 10Pf if using a crystal.
Crystal Output. 14.31818 MHz for the video clock synthesizer reference. Leave open
if a clock source is used instead of a crystal. Connect to main ground plane GND with
10Pf if using a crystal.
Reset. Driven from the South Bridge PCIRST# signal. When asserted (low), this signal
resets the ProMedia and sets all register bits to the default value. This signal also
connects to the PCI bus (South Bridge RESET drives the ISA bus if implemented). The
rising edge of this signal is used to sample all power-up strap options (see memory
interface MA pins).
CPU Reset. CPU Reset output to the host CPU.
CPU Reset Delayed 2T. Alternate CPU Reset output to the host CPU
Power OK. Connect to South Bridge and Power Good circuitry.
Suspend Status. For implementation of the Suspend-to-DRAM feature. Input logic for
this pin is powered by VSUS. Connect to the South Bridge SUST# pin or to a 10KΩ
pullup to VSUS if not used.
Suspend. Used to put the integrated graphics controller into suspend state.. Input logic
for this pin is powered by VSUS. Connect to South Bridge GPO pin or to a 10KΩ
pullup to VSUS if not used.
Miscellaneous
Signal Name
ETST#
IMIO
IMIIN
Pin #
I/O
F4
M2
M3
I
O
I
Revision 1.3 September 8, 1999
Signal Description
Test Mode Enable. 4.7KΩ pullup to VCC3 for normal operation.
IMI Out. Leave open.
IMI In. 4.7KΩ pullup to VCC3.
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CRT Interface
Signal Name
Pin #
I/O
RED
C2
A
GRN
BLUE
HSYNC
D3
D2
E2
A
A
O
VSYNC
E1
O
SDA
F2
IO
SCL
F3
IO
Signal Description
Red. Red analog output to the CRT. Connect 75Ω load resistor to GNDR (RGB Return)
and connect to VGA connector through a series ferrite bead and 10pF capacitors to GNDR
on both input and output sides of the bead (see “Apollo ProMedia Design Guide”).
Green. Green analog output to the CRT. Connect same as RED.
Blue. Blue analog output to the CRT. Connect same as RED.
Horizontal Sync. Digital horizontal sync output to the CRT. Also used (with VSYNC)
to signal power management state information to the CRT per the VESA™ DPMS™
standard. Connect to VGA connector through a series 47Ω resistor and 120pF capacitor
to ground (see “Apollo ProMedia Design Guide”).
Vertical Sync. Digital vertical sync output to the CRT. Also used (with HSYNC) to
signal power management state information to the CRT per the VESA™ DPMS™
standard. Connect to VGA connector through a series 47Ω resistor and 120pF capacitor
to ground (see “Apollo ProMedia Design Guide”).
DDC Data/Address. Serial I2C protocol for VESA™ DDC2B signaling to the CRT.
Connect this pin to VCC5 through a 4.7KΩ pullup. Connect to the VGA connector only
(pin 12 of the connector). Connect through a ferrite bead and 120pF capacitor to ground
(on the output side of the bead). Refer to the “Apollo ProMedia Design Guide” for
additional information.
DDC Clock. Serial I2C protocol for VESA™ DDC2B signaling to the CRT. Connect this
pin to VCC5 through a 4.7KΩ pullup. Connect to the VGA connector only (pin 15 of the
VGA connector). Connect through a ferrite bead and 120pF capacitor to ground (on the
output side of the bead). Refer to the “Apollo ProMedia Design Guide” for additional
information.
DFP Interface
Signal Name
Pin #
I/O
Signal Description
(see pin list)
O
PD[23-0]
Panel Data. Digital pixel data outputs to the panel.
G4
O
SCLK
Shift Clock. Clock for transferring digital pixel data.
H3
O
DE
Data Enable. Indicates valid data on PD[23-0].
G5
O
LP
Line Pulse. Digital monitor equivalent of HSYNC.
G3
O
FLM
First Line Marker. Digital monitor equivalent of VSYNC.
F1
O
EVDD
Enable Panel VDD Power.
H5
O
EVEE
Enable Panel VEE Power.
G1
O
EBLT
Enable Panel Backlight.
Note: Connect SHFCLK, DE, LP, and FLM to external TMDS transmitters through series 22Ω resistors. See the “Apollo
ProMedia Design Guide” for DFP interface design examples and additional information.
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TV Input / Video Interface
Signal Name
Pin #
I/O
Signal Description
N4, N1, N2, N5, P4, P3, P2, P5,
IO Video Capture / Playback Data.
R3, R1, R4, R2, R5, T1, T2, R6
T3
IO Video Horizontal Sync. Connect to TV decoder if used.
VHS
U1
IO Video Vertical Sync. Connect to TV decoder if used.
VVS
U3
IO Video Clock. Connect to TV decoder through a series 22Ω resistor.
VCLK
Note: Refer to the “Apollo ProMedia Design Guide” for video interface design examples.
VD[15-0]
TV Output Interface
Signal Name
Pin #
I/O
Signal Description
U2, T6, U4, T5, V3, U5, V2, V1
O
TVD[7-0]
TV Output Data. Connect to TV encoder if used.
V5
O
TVHS
TV Horizontal Sync. Connect to TV encoder if used.
W3
O
TVVS
TV Vertical Sync. Connect to TV encoder if used.
V4
O
TVCLK
TV Clock. Connect to TV encoder through a series 22Ω resistor.
Note: Refer to the “Apollo ProMedia Design Guide” for TV interface design examples.
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Clock Power / Ground and Filtering
Signal Name
Pin #
I/O
VCCA
H21, H22
P
GNDA
L21, L22
P
VCCV1
W2
P
GNDV1
Y1
P
VLF1
Y3
A
VCCV2
Y2
P
GNDV2
AA1
P
VLF2
AA2
A
PLLTST
K24
Signal Description
Power for North Bridge Clock Circuitry (2.5V ±5%). Connect to VCCI through a
ferrite bead and decouple to GNDA with 0.001Uf and 0.1Uf ceramic and 10Uf tantalum
capacitors (see “Apollo ProMedia Design Guide”).
Ground for North Bridge Clock Circuitry. Connect to main ground plane GND
through a ferrite bead. (see “Apollo ProMedia Design Guide”).
Power for Video Clock Synthesizer 1 Analog Circuitry (2.5V ±5%). Connect to
VCCI through a ferrite bead and decouple to GNDV1 with 0.001Uf and 0.1Uf ceramic
and 10Uf tantalum capacitors (see “Apollo ProMedia Design Guide”).
Ground for Video Clock Synthesizer 1. Connect to main ground plane through a
ferrite bead.
Low Pass Filter Capacitor for Video Clock Synthesizer 1. Connect to GNDV1
through a 560Pf capacitor.
Power for Video Clock Synthesizer 2 Analog Circuitry (2.5V ±5%). Connect to
VCCI through a ferrite bead and decouple to GNDV2 with 0.001Uf and 0.1Uf ceramic
and 10Uf tantalum capacitors (see “Apollo ProMedia Design Guide”).
Ground for Video Clock Synthesizer 2. Connect to main ground plane through a
ferrite bead.
Low Pass Filter Capacitor for Video Clock Synthesizer 2. Connect to GNDV2
through a 560Pf capacitor.
PLL Test. Pull down with 4.7K resistor for normal operation.
RAMDAC Output Power / Ground and Analog Control
Signal Name
Pin #
I/O
VCCS
C1
P
GNDS
B1
P
COMP
E4
A
IRSET
E3
A
GNDRGB
A1
P
Signal Description
Power for RAMDAC Current Source Circuitry (2.5V ±5%). Connect to VCCI
through a ferrite bead and decouple to GNDS with 0.001uF and 0.1uF ceramic and 10uF
tantalum capacitors (see “Apollo ProMedia Design Guide”).
Ground for RAMDAC Current Source Circuitry. Connect to main ground plane
through a ferrite bead.
Compensation Capacitor. RAMDAC analog control. Connect to VCCS using a 0.1
uF capacitor.
RAMDAC Current Set Point Resistor. RAMDAC analog control. Connect to GNDS
through a 360Ω 1% resistor.
RGB Video Output Return. Connection point for the RGB load resistors. Also used
as a shield for the RGB video output traces to the VGA display connector. Connects to
RGB return pins 6, 7, and 8 of the VGA connector. Connect to main ground plane
through a ferrite bead. Refer to the “Apollo ProMedia Design Guide” for more specific
connection and PCB layout details.
Commonly Used Prefix / Suffix Letters in Signal Names:
I = Internal Logic
A = North Bridge Clock Synthesizer
M = Memory (SDRAM) Interface
V1 = Video Clock Synthesizer PLL1
H = Host CPU Interface
V2 = Video Clock Synthesizer PLL2
P = PCI Bus Interface
D = Video Clocks Digital Data Path
G = AGP Bus (internal in ProMedia)
R = RAMDAC Digital Data Path
GM = Graphics Memory Interface
S = RAMDAC Current Source
U (or USB) = USB (Universal Serial Bus)
RGB = Analog Video Out Return
H (or HWM) = Hardware Monitoring
TV = TV Out
SUS = Suspend Power
V = TV In / Video Capture
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Digital Power and Ground
Signal Name
Pin #
I/O
VCC5
U6
P
VCC3
P
VSUS3
F7, F10, F12, F17, F20, G6,
G21, H6, K21, L4, L12, L15,
M11, M16, R11, R16, T4,
T12, T15, U21, W6, Y6, Y21,
AA7, AA10, AA17, AA20
V22, W22, AB22
VSUS2
AA22
P
VCCI
P
VCCD
F9, F18, J6, J21, V6, V21,
AA9, AA18
W1
VCCR
D1
P
E11, F19
E12, E21
P
P
A9, A18, A26, B2, C8, C14,
C19, D4, D23, F6, F13-F14,
F16, F21, H24, J26, L11, L13,
L14, L16, M12-M15, M21,
N3, N6, N11-N16, N21, P1, P6,
P11-P16, P21, R12-R15, T11,
T13, T14, T16, T21, V26,
W24, AA6, AA13-AA15,
AA21, AC4, AC23, AD8,
AD13, AD19, AF1, AF9,
AF18, AF26
A2-A5, B3-B5, C3-C5, Y5,
AA3-AA5, AB1-AB4, AC1
P
Power for Video Clock Synthesizer Digital Logic (2.5V ±5%).
Connect to VCCI through a ferrite bead and decouple to main ground
plane GND with 0.001uF and 0.1uF ceramic and 10uF tantalum
capacitors (see “Apollo ProMedia Design Guide”).
Power for RAMDAC Video Output Digital Logic (2.5V ±5%).
Connect to VCCI through a ferrite bead and decouple to main ground
plane GND with 0.001uF and 0.1uF ceramic and 10uF tantalum
capacitors (see “Apollo ProMedia Design Guide”).
CPU Interface Termination Voltage (1.5V ±10%).
CPU Interface GTL+ Voltage Reference. 2/3 VTT ±2%. Derived
from the termination voltage to the pullup resistors. Determines the
noise margin for the host CPU interface signals. Internally connects to
+
+
the GTL sense amp on each GTL input or I/O pin.
Ground. Connect to primary PCB ground plane.
-
No Connect.
VTT
GTLREF
GND
NC
Revision 1.3 September 8, 1999
P
P
Signal Description
Power for Display / Video Interfaces (5V ±5%). Power for CRT
H/VSYNC, DFP interface, video interface, and TV interface. Used to
provide adequate output voltage swing for driving external video
devices. Also used to provide 5V input tolerance from those interfaces.
Power for On-Board Interfaces (2.5V to 3.3V ±5%). Power for host
CPU / L2 Cache interface, PCI bus interface, and memory interface
(except pins listed below under VSUS).
Suspend Power (3.3V ±5%). Power for memory interface signals
SRASC#, SCASC#, SWEC#, SWEB#, RAS[5-0]#, CAS[7-0]#, and
MECC[7-0] as well as SUSTAT# and SUSCLK. Connect to VCC3 if
suspend functions are not implemented.
Suspend Power (2.5V ±5%). Connect to VCCI if suspend functions
are not implemented.
Power for On-Chip Internal Logic (2.5V ±5%).
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REGISTERS
Register Overview
Register Summary Tables
The following tables summarize the configuration and I/O
registers of the ProMedia. These tables also document the
power-on default value (“Default”) and access type (“Acc”)
for each register. Access type definitions used are RW
(Read/Write), RO (Read/Only), “—” for reserved / used
(essentially the same as RO), and RWC (or just WC) (Read /
Write 1’s to Clear individual bits). Registers indicated as RW
may have some read/only bits that always read back a fixed
value (usually 0 if unused); registers designated as RWC or
WC may have some read-only or read write bits (see
individual register descriptions following these tables for
details). All offset and default values are shown in
hexadecimal unless otherwise indicated.
Revision 1.3 September 8, 1999
Table 2. Register Summary
I/O Ports
Port #
22
CFB-8
CFF-C
-23-
I/O Port
PCI / AGP Arbiter Disable
Configuration Address
Configuration Data
Default
00
0000 0000
0000 0000
Acc
RW
RW
RW
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Bus 0 Registers - Host Bridge
PCI Configuration Registers
Offset
1-0
3-2
5-4
7-6
8
9
A
B
C
D
E
F
13-10
14-27
28-2B
2D-2C
2F-2E
33-30
37-34
34-3B
3C-3D
3E-3F
Device-Specific Configuration Registers (continued)
Default
Configuration Header
Vendor ID
1106
Device ID
0601
Command
0006
Status
0290
Revision ID
nn
Program Interface
00
Sub Class Code
00
Base Class Code
06
-reserved- (cache line size)
00
Latency Timer
00
Header Type
00
Built In Self Test (BIST)
00
Graphics Aperture Base
0000 0008
-reserved- (base address registers)
00
-reserved- (unassigned)
00
Subsystem Vendor ID
0000
Subsystem ID
0000
-reserved- (expan ROM base addr)
00
Capability Pointer
0000 00A0
-reserved- (unassigned)
00
-reserved- (interrupt line & pin)
00
-reserved- (min gnt and max latency)
00
Acc
RO
RO
RW
WC
RO
RO
RO
RO
—
RW
RO
RO
RW
—
—
RW
RW
—
RO
—
—
—
Offset
70
71
72
73
74
75
76
77
78
79
7A
7B-7D
7E-7F
80-FF
PCI Bus Control
PCI Buffer Control
CPU to PCI Flow Control 1
CPU to PCI Flow Control 2
PCI Master Control 1
PCI Master Control 2
PCI Arbitration 1
PCI Arbitration 2
Chip Test (do not program)
PMU Control 1
PMU Control 2
Miscellaneous Control
-reservedDLL Test Mode (do not program)
-reserved-
Default
00
00
00
00
00
00
00
00
00
00
00
00
00
00
Acc
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
RW
—
Offset
83-80
84
85-87
8B-88
8C-8F
GART/TLB Control
GART/TLB Control
Graphics Aperture Size
-reserved- (unassigned)
Gr. Aperture Translation Table Base
-reserved- (unassigned)
Default
0000 0000
00
00
0000 0000
00
Acc
RW
RW
—
RW
—
AGP Control
AGP ID
AGP Next Item Pointer
AGP Specification Revision
-reserved- (unassigned)
AGP Status
AGP Command
AGP Control
AGP Latency
-reserved- (unassigned)
Default
02
00
10
00
0700 0203
0000 0000
00
00
00
Acc
RO
RO
RO
—
RO
RW
RW
RW
—
Offset
50
51
52
53
55-54
57-56
CPU Interface Control
Request Phase Control
Response Phase Control
Dynamic Defer Timer
Miscellaneous
Non-Cacheable Region #1
Non-Cacheable Region #2
Default
00
00
10
00
0000
0000
Acc
RW
RW
RW
RW
RW
RW
Offset
A0
A1
A2
A3
A7-A4
AB-A8
AC
AD
AC-EF
Offset
59-58
5A-5F
5A
5B
5C
5D
5E
5F
60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6D
6E-6F
DRAM Control
MA Map Type
DRAM Row Ending Address:
Bank 0 Ending (HA[29:22])
Bank 1 Ending (HA[29:22])
Bank 2 Ending (HA[29:22])
Bank 3 Ending (HA[29:22])
Bank 4 Ending (HA[29:22])
Bank 5 Ending (HA[29:22])
DRAM Type
ROM Shadow Control C0000-CFFFF
ROM Shadow Control D0000-DFFFF
ROM Shadow Control E0000-FFFFF
DRAM Timing for Banks 0,1
DRAM Timing for Banks 2,3
DRAM Timing for Banks 4,5
-reserved- (unassigned)
DRAM Control
DRAM Clock Select
DRAM Refresh Counter
DRAM Arbitration Control
SDRAM Control
DRAM Control Drive Strength
-reserved- (unassigned)
Default
0000
Acc
RW
Offset BIOS Scratch
F0-F7 BIOS Scratch
Default
00
Acc
RW
01
01
01
01
01
01
00
00
00
00
EC
EC
EC
00
00
00
00
01
00
00
00
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
Offset
F8
F9
FA
FB
Miscellaneous Control
DRAM Arbitration Timer 1
DRAM Arbitration Timer 9
CPU Direct Access FB Base Address
Frame Buffer Conrol
Default
00
00
00
00
Acc
RW
RW
RW
RW
Offset
FC
FD
FF-FE
Back Door Control
Back Door Control 1
Back Door Control 2
Back Door Device ID
Default
00
00
0000 0000
Acc
RW
RW
RW
Device-Specific Configuration Registers
Revision 1.3 September 8, 1999
-24-
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 1 Bus 0 Registers - PCI-to-AGP Bridge
PCI Configuration Registers
Offset
1-0
3-2
5-4
7-6
8
9
A
B
C
D
E
F
10-17
18
19
1A
1B
1C
1D
1F-1E
21-20
23-22
25-24
27-26
28-3D
3F-3E
Configuration Header
Vendor ID
Device ID
Command
Status
Revision ID
Program Interface
Sub Class Code
Base Class Code
-reserved- (cache line size)
Latency Timer
Header Type
Built In Self Test (BIST)
-reserved- (base address registers)
Primary Bus Number
Secondary Bus Number
Subordinate Bus Number
-reserved- (secondary latency timer)
I/O Base
I/O Limit
Secondary Status
Memory Base
Memory Limit (Inclusive)
Prefetchable Memory Base
Prefetchable Memory Limit
-reserved- (unassigned)
PCI-to-AGP Bridge Control
Revision 1.3 September 8, 1999
Device-Specific Configuration Registers
Default
1106
8601
0007
0220
nn
00
04
06
00
00
01
00
00
00
00
00
00
F0
00
0000
FFF0
0000
FFF0
0000
00
00
Acc
RO
RO
RW
WC
RO
RO
RO
RO
—
RW
RO
RO
—
RW
RW
RW
—
RW
RW
RO
RW
RW
RW
RW
—
RW
-25-
Offset
40
41
42
43-4F
AGP Control
CPU-to-AGP Flow Control 1
CPU-to-AGP Flow Control 2
AGP Master Control
-reserved- (unassigned)
Default
00
00
00
00
Acc
RW
RW
RW
—
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Bus 1 Registers - 2D / 3D Graphics Accelerator
PCI Configuration Registers
Offset
1-0
3-2
5-4
7-6
8
9
A
B
F-C
13-10
17-14
1B-18
2B-1C
2D-2C
2F-2E
33-30
3B-34
3C
3D
3E-3F
Offset
40-8F
93-90
97-94
98-FF
Configuration Header
Vendor ID
Device ID
PCI Command
PCI Status
Revision ID
Register Level
Sub Class Code
Base Class Code
-reservedMemory Base 0 (8MB display mem)
Memory Base 1 (128K mem map IO)
Memory Base 2 (8MB video overlay)
-reservedSubsystem Vendor ID
Subsystem ID
Expansion ROM Base
-reservedInterrupt Line
Interrupt Pin
-reservedDevice-Specific Configuration
-reservedPower Management 1
Power Management 2
-reserved-
AGP Registers (2300-23FF)
Default
1023
8500
0003
0220
nn
00
00
03
—
E000 0000
E080 0000
E040 0000
—
0000
0000
0000 0001
—
0B
01
—
Default
—
—
—
—
Acc
R
R
RW
RW
R
R
R
R
—
RW
RW
RW
—
RW
RW
RW
—
RW
R
—
Acc
—
RW
RW
—
PCI Bus Master Registers (2204, 2300, 231x, 232x)
I/O Port
2207-2204
2303-2300
2313-2310
2315-2314
2317-2316
231B-2318
231D-231C
231F-231E
2323-2320
PCI Bus Master Registers
Master Status
Master Control
System Side Start Address
Master Height
Master Width
FB Start Address & Pitch
System Side Pitch
-reservedClear Data
Revision 1.3 September 8, 1999
Default
—
—
—
—
—
—
—
—
—
Acc
R
RW
RW
RW
RW
RW
RW
—
RW
-26-
I/O Port
2303-2300
2307-2304
230F-2308
2323-2310
2333-2324
2337-2334
233F-2338
I/O Port
2343-2340
2347-2344
234B-2348
234F-234C
2353-2350
2357-2354
235B-2358
235F-235C
2363-2360
2367-2364
236B-2368
236F-236C
2373-2370
237F-2374
I/O Port
2383-2380
2387-2384
238B-2388
23AF-238C
I/O Port
23B3-23B0
23B7-23B4
23FF-23B8
AGP Configuration Regs
(See PCI Bus Master Regs)
Capability List
-reserved(See PCI Bus Master Regs)
-reservedCapability List Address
-reservedAGP Operation Registers
FB Command List Start Addr
FB Command List Size
Ch 1 FB Start Addr / Pitch
Ch 1 Frame Buffer Size
Ch 1 System Start Address
Ch 1 & 2 System Side Pitch
Ch 2 System Start Address
Ch 2 FB Start Addr / Pitch
Ch 2 FB Size
Ch Arb Counter Threshold
Channel 1/0 Control
Global & Channel 2 Control
Cmd List / Ch 0/1/2 Op Status
-reservedAGP Configuration Regs
Capability Identifier
AGP Status
AGP Command
-reservedAGP Command Buffer Regs
Command Buffer Start Addr
Command Buffer End Addr
-reserved-
Default
Acc
—
—
RW
—
—
—
—
Default
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Default
—
—
—
—
Default
—
—
—
—
RW
—
Acc
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
Acc
RW
RW
RW
—
Acc
RW
RW
—
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Capture Registers (2200)
I/O Port
2203-2200
Capture Registers
Capture Command
Extended Registers – Non-Indexed I/O Ports
Default Acc
—
RW
DVD Registers (2280-22FF)
I/O Port
2280
2281
2282
2283
2285-2284
2287-2284
228B-2288
228F-228C
2293-2290
2297-2294
229B-2298
229F-229C
22A0
22A1
22A2
22A3
22A5-22A4
22A7-22A6
22AB-22A8
22AF-22AC
22B3-22B0
22B7-22B4
22BB-22B8
22BF-22BC
22C1-22C0
22CF-22C2
22D0
22D3-22D1
22FF-22D4
DVD Registers
MC ID
MC Control
MC Frame Buffer Config
-reservedMC Status
MC Command Queue
MC Y-Reference Address
MC U-Reference Address
MC V-Reference Address
MC Display Y-Address Offset
MC Display U-Address Offset
MC Display V-Address Offset
MC H Macroblock Count
-reservedMC V Macroblock Count
-reservedMC Frame Buffer Y-Length
-reservedColor Palette Entries
-reservedSP BUF0 Pixel Start Address
SP BUF1 Pixel Start Address
SP BUF0 Cmd Start Address
SP BUF1 Cmd Start Address
SP Y Display Offset
-reservedDigital TV Encoder Control
Digital TV Encoder CFC
-reserved-
Revision 1.3 September 8, 1999
Default
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Acc
R
RW
RW
—
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
RW
—
RW
—
RW
—
RW
RW
RW
RW
RW
—
RW
RW
—
-27-
I/O Port
Extended Non-Indexed Regs Default Acc
3D8
Alt Destination Segment Addr
00
RW
3D9
Alt Source Segment Address
—
RW
3xB
Alt Clock Select
—
RW
Note: 3xB notation indicates that these registers are accessible
at either 3BB or 3DB depending on the setting of the color /
mono bit.
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Standard VGA Registers
Standard VGA Registers – Graphics Controller (GR)
Port Index VGA Registers
Default Acc
3B4/5 0-18 CRT Controller (Mono Mode)
—
RW
3BA
— Input Status 1 (Mono Mode)
—
R
3C0/1 0-14 Attribute Controller
—
RW
3C2
— Input Status 0
—
R
3C2
— Miscellaneous Output (Write)
—
W
3C3
— Video Subsystem Enable
—
RW
3C4/5 0-4 Sequencer
—
RW
3C6
— RAMDAC Pixel Mask
—
RW
3C7
— RAMDAC Read Index
—
W
3C8
— RAMDAC Write Index
—
W
3C8
— RAMDAC Index Readback
—
R
3C9 0-FF RAMDAC Palette Data
—
RW
3CC
— Miscellaneous Output (Read)
—
R
3CE/F 0-8 Graphics Controller
—
RW
3D4/5 0-18 CRT Controller (Color Mode)
—
RW
3DA
— Input Status 1 (Color Mode)
—
R
46E8
— Display Adapter Enable
—
RW
Note: CRTC registers are accessible at either 3B4 / 3B5 or
3D4 / 3D5 (shorthand notation 3x4 / 3x5) depending on the
setting of the color / mono bit.
Standard VGA Registers – Attribute Controller (AR)
Port Index Attribute Controller Regs
3C0
— Index
3C0/1 0-F Color Palette
3C0/1 10 Attribute Mode Control
3C0/1 11 Overscan Color
3C0/1 12 Color Plane Enable
3C0/1 13 Horizontal Pixel Panning
3C0/1 14 Color Select
Default
—
—
—
—
—
—
—
Acc
RW
RW
RW
RW
RW
RW
RW
Default
—
—
—
—
—
—
Acc
RW
RW
RW
RW
RW
RW
Standard VGA Registers – Sequencer (SR)
Port
3C4
3C5
3C5
3C5
3C5
3C5
Index
—
0
1
2
3
4
Sequencer Registers
Index
Reset
Clocking Mode
Map Mask
Character Map Select
Memory Mode
Revision 1.3 September 8, 1999
-28-
Port
3CE
3CF
3CF
3CF
3CF
3CF
3CF
3CF
3CF
3CF
Index
—
0
1
2
3
4
5
6
7
8
Graphics Controller Regs
Index
Set / Reset
Enable Set / Reset
Color Compare
Data Rotate
Read Map Select
Graphics Mode
Miscellaneous
Color Don’t Care
Bit Mask
Default
—
—
—
—
—
—
00
—
—
—
Acc
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Standard VGA Registers – CRT Controller (CR)
Port Index CRT Controller Registers
Default Acc
3x4
— Index
—
RW
3x5
0 Horizontal Total
00
RW
3x5
1 Horizontal Display Enable
00
RW
3x5
2 Horizontal Blanking Start
00
RW
3x5
3 Horizontal Blanking End
00
RW
3x5
4 Horizontal Retrace Start
RW
FF
3x5
5 Horizontal Retrace End
00
RW
3x5
6 Vertical Total
00
RW
3x5
7 Overflow
00
RW
3x5
8 Preset Row Scan
00
RW
3x5
9 Maximum Scan Line
00
RW
3x5
A Cursor Start
00
RW
3x5
B Cursor End
00
RW
3x5
C Start Address High
00
RW
3x5
D Start Address Low
00
RW
3x5
E Cursor Location High
00
RW
3x5
F Cursor Location Low
00
RW
3x5
10 Vertical Retrace Start
00
RW
3x5
11 Vertical Retrace End
00
RW
3x5
12 Vertical Display Enable End
00
RW
3x5
13 Offset
00
RW
3x5
14 Underline Location
00
RW
3x5
15 Vertical Blanking Start
00
RW
3x5
16 Vertical Blanking End
00
RW
3x5
17 CRTC Mode Control
00
RW
3x5
18 Line Compare
00
RW
Note: CRTC registers are accessible at either 3B4 / 3B5 or
3D4 / 3D5 (shorthand notation 3x4 / 3x5) depending on the
setting of the color / mono bit.
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Extended Registers – VGA Sequencer Indexed
Port
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
Index
8
9
A
B
C
C
D
D
E
E
F
10
11
12
13-17
18
19
1A
1B
1C-1F
20
21
23-22
24
25
26-36
37
38
39-4F
52-50
53
56-54
57
58-59
5A-5F
62-60
63
66-64
67-7F
Extended Sequencer Regs
Old-New Status
Graphics Controller Version
-reservedVersion/Old-New Mode Ctrl
Configuration Port 1
Configuration Port 2
Old Mode Control 2
New Mode Control 2
Old Mode Control 1
New Mode Control 1
Power-up Mode 2
VESA™ Big BIOS Control
Protection
Threshold
-reservedVCLK1 Frequency Control 0
VCLK1 Frequency Control 1
VCLK2 Frequency Control 0
VCLK2 Frequency Control 1
-reservedClock Syn / RAMDAC Setup
Signature Control
Signature Data
Power Management Ctrl
Monitor Sense
-reservedVideo Key Mode
Feature Connector Control
-reservedPlayback Color Key Data
-reservedPlayback Color Key Mask
Playback Vid Key Mode
-reservedScratch Pad 0-5
2nd Playback Color Key Data
-reserved2nd Playback ColorKey Mask
-reserved-
Revision 1.3 September 8, 1999
Default
00
58
—
F3
B7
—
20
10
A8
40
BF
00
00
21
—
00
00
00
00
—
00
00
—
0E
—
—
00
00
—
—
—
—
—
—
—
—
—
—
—
Acc
R
R
—
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
RW
RW
RW
RW
—
RW
RW
R
RW
R
—
RW
RW
—
RW
—
RW
RW
—
RW
RW
—
RW
—
-29-
Port
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
3C5
Index New Video Display Regs
Default
82-80 W1 U FB Start Address
—
85-83 W1 V FB Start Address
—
88-86 W2 FB Start Address
—
8A-89 W2 H Scaling Factor
—
8C-8B W2 V Scaling Factor
—
90-8D W2 Live Video Start
—
94-91 W2 Live Video End
—
95 W2 Live Vid Line Buf Level
—
96 New Live Video Win Ctrl 0
00
97 New Live Video Win Ctrl 1
00
98 New Live Video Win Ctrl 2
00
99 New Live Video Win Ctrl 3
00
9B-9A Vid Row Byte Off. (W1-UV)
—
9D-9C Vid Row Byte Offset (W2-Y)
—
9E Line Buf Req Threshold
00
9F VBI Control
—
A3-A0 VBI Frame Buffer Address
—
A7-A4 VBI Capture Start
—
AB-A8 VBI Capture End
—
AD-AC VBI V Interrupt Position
—
AF-AE Capture Row Byte Offset
—
B1-B0 Window 1 HSB Control
—
B3-B2 Window 2 HSB Control
—
B6-B4 2nd Display Addr Select
—
B7 Video Sharpness
—
BA-B8 2nd Capture Addr Select
—
BB -reserved—
BC Contrast Control
—
BD Dual View MUX Control
—
BE Miscellaneous Control Bits
00
BF-CD -reserved—
CE Window 2 Live Video Ctrl
00
CF -reserved—
D1-D0 Row Byte Offset (W2-UV)
—
D4-D2 W2 U-Frame Start Address
—
D7-D5 W2 V-Frame Start Address
—
D9-D8 Digital TV Interface Control
—
DB-DA W2 V Count Status
—
DD-DC Dual View Control
—
DF-DE W1 V Count Status
—
Acc
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
RW
RW
RW
—
RW
—
RW
RW
RW
RW
R
RW
R
Port
3C5
Index Reserved Registers
E0-FF -reserved-
Acc
RW
Default
—
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Extended Registers – VGA Graphics Controller Indexed
Port Index Extd Graphics Ctrlr Regs
Default Acc
3CE/F
E Old / New Src Segment Addr
00
RW
3CE/F
F Misc Extended Function Ctrl
00
RW
3CE/F 10-1F -reserved—
—
3CE/F 20-2F Power Management Regs
20 Standby Timer Control
0xxx0000b RW
21 Power Management Control 1
00
RW
22 Power Management Control 2
00
RW
23 Power Status
—
RW
24 Soft Power Control
RW
E0
25 Power Control Select
RW
FF
26 DPMS Control
00
RW
28-27 GPIO Control
0000
RW
29 -reserved—
—
2A Suspend Pin Timer
00
RW
2B -reserved—
—
2C Miscellaneous Pin Control
00
RW
2D-2E -reserved—
—
2F Miscellaneous Internal Ctrl
00
RW
3CE/F 30-5A -reserved—
—
3CE/F 5A-5F Scratch Pad 0-5
—
RW
3CE/F 60-7F -reserved—
—
Revision 1.3 September 8, 1999
-30-
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Extended Registers – VGA CRT Controller Indexed
Port Index Extended CRTC Registers
3x5
0E CRT Module Test
3x5
19 CRT Interlace Control
3x5
1A Arbitration Control 1
3x5
1B Arbitration Control 2
3x5
1C Arbitration Control 3
3x5 1D-1E -reserved3x5
1F Software Programming
3x5
20 Command FIFO
3x5
21 Linear Addressing
3x5
22 CPU Latch Readback
3x5
23 -reserved3x5
24 VGA Attribute State
3x5
25 RAMDAC RW Timing
3x5
26 -reserved3x5
27 CRT High Order Start
3x5
28 -reserved3x5
29 RAMDAC Mode
3x5
2A In terface Select
3x5
2B Horiz. Parameter Overflow
3x5
2C -reserved3x5
2D GE Timing Control
3x5
2E -reserved3x5
2F Performance Tuning
3x5 30-33 -reserved3x5 35-34 GE IO Linear Address Base
3x5
36 Graphics / Video Engine Ctrl
3x5
37 I2C Control
3x5
38 Pixel Bus Mode
3x5
39 PCI Interface Control
3x5
3A Physical Address Control
3x5
3B Clock and Tuning
3x5
3C Misc Control
3x5 3D-3F -reserved3x5 40-50 Hardware Cursor Registers
43-40 HW Cursor Position
45-44 HW Cursor Pattern Location
47-46 HW Cursor Offset
4F-48 HW Cursor Color
50 HW Cursor Control
3x5
51 Bus Grant Termination Ctrl
3x5
52 Shared Frame Buffer Ctrl
3x5 53-54 -reserved3x5
55 PCI Retry Control
3x5
56 Display Pre-end Control
3x5
57 Display Pre-end Fetch Param.
3x5 58-5D -reserved3x5
5E Capture / ZV Port Control
3x5
5F Test Control
3x5 60-61 -reserved3x5
62 Enhancement 0
3x5
63 Enhancement 1
3x5
64 DPA Extra
3x5 65-7F -reserved-
Revision 1.3 September 8, 1999
Default
00
—
00
00
00
—
—
00
00
—
—
—
0F
—
00
—
00
10
00
—
00
—
03
—
0000
00
82
00
0000000nb
00
0n000001b
00
—
Acc
RW
RW
RW
RW
RW
—
RW
RW
RW
RO
—
RO
RW
—
RW
—
RW
RW
RW
—
RW
—
RW
—
RW
RW
RW
RW
RW
RW
RW
RW
—
—
—
—
—
—
—
000x0010b
—
0F
00
—
—
x0000000b
00
—
04
00
—
—
RW
RW
RW
RW
RW
RW
RW
—
RW
RW
RW
—
RW
RW
—
RW
RW
RW
—
-31-
Port Index Extended CRTC Registers
3x5 80-BF Video / Capture Engine
81-80 Horiz Scaling Factor (W1)
83-82 Vert Scaling Factor (W1)
85-84 -reserved89-86 Video Window Start (W1)
8D-8A Video Window End
8F-8E Video Display Engine Flag
91-90 Row Byte Offset (W1, W1-Y)
94-92 Vid Start Addr (W1-Y or W1)
95 Vid Win Line Buffer Thresh
96 Line Buf Lev Ctl (W1-Y, W1)
97 Video Display Engine Flag
9A-98 Capture Video Start Address
9B Video Display Status
9C Capture Control 1
9D Capture Control 2
9E Capture Control 3
9F Capture Control 4
A1-A0 Capture Vertical Total
A3-A2 Capture Horizontal Total
A5-A4 Capture Vertical Start
A7-A6 Capture Vertical End
A9-A8 Capture Horizontal Start
AB- Capture Horizontal End
AC Capture Vert Sync Pulse
AD Capture Horiz Sync Pulse
AE Capture CRTC Control
AF Capture CRTC Control
B1-B0 Capture Horiz Minify Factor
B3-B2 Capture Vert Minify Factor
B5-B4 DST Pixel Width Count
B7-B6 DST Pixel Height Count
B8 Capture FIFO Control 1
B9 Capture FIFO Control 2
BB- Chromakey Comp Data 0 Lo
BD- Chromakey Comp Data 0 Hi
BE Capture Control
BF Display Engine Flag 4
3x5 C0-CF -reserved3x5 D3-D0 VGA / Digital TV Sync Ctrl 1
3x5 D4-FF -reserved-
Default
Acc
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
RW
RW
—
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
RW
—
Default
—
—
—
—
—
—
—
—
—
Acc
RW
RW
RW
RW
RW
RW
RW
RW
RW
Extended Registers – CRTC Shadow
Port
3x5
3x5
3x5
3x5
3x5
3x5
3x5
3x5
3x5
Index
00
03
04
05
06
07
10
11
16
CRTC Shadow Registers
Horizontal Total
Horizontal Blanking End
Hoprizontal Retrace Start
Horizontal Retrace End
Vertical Total
Overflow
Vertical Retrace Start
Vertical Retrace End
Vertical Blanking End
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
3D Graphics Engine Registers
These registers are addressed at offsets from the Graphics
Engine Base Address (GEbase). All registers are 32-bit.
Default Acc
Offset Span Engine Registers
3-0 Parameter Source 1
—
RW
7-4 Parameter Source 2
—
RW
B-8 Parameter Destination 1
—
RW
F-C Parameter Destination 2
—
RW
Offset VGA Core Registers
Default Acc
13-10 Right View Display Base Addresses
—
RW
17-14 Left View Display Base Addresses
—
RW
1B-18 Block Write Start Address
—
RW
1F-1C Block Write Area / End Address
—
RW
23-20 GE Status
—
R
27-24 GE Control
—
W
2B-28 GE Debug
—
R
2F-2C Wait Mask
—
RW
Offset Rasterization & Setup Engine Regs Default Acc
33-30 Primitive Attribute
—
RW
37-34 -reserved—
—
3B-38 -reserved—
—
3F-3C Primitive Type
—
W
3F-3C Setup Engine Status
—
R
Offset Pixel Engine Registers
Default Acc
43-40 -reserved—
—
47-44 Drawing Command
—
RW
4B-48 Raster Operation (ROP)
—
RW
4F-4C Z-Function
—
RW
53-50 Texture Function
—
RW
57-54 Clipping Window 0
—
RW
5B-58 Clipping Window 1
—
RW
5F-5C -reserved—
—
63-60 Color 0
—
RW
67-64 Color 1
—
RW
6B-68 Color Key
—
RW
6F-6C Pattern and Style
—
RW
73-70 Pattern Color
—
RW
77-74 Pattern Foreground Color
—
RW
7B-78 Pattern Background Color
—
RW
7F-7C Alpha
—
RW
83-80 Alpha Function
—
RW
87-84 Bit Mask
—
RW
8B-88 -reserved—
—
8F-8C -reserved—
—
93-90 -reserved—
—
97-94 -reserved—
—
9B-98 -reserved—
—
9F-9C -reserved—
—
Revision 1.3 September 8, 1999
-32-
Offset
A3-A0
A7-A4
AB-A8
AF-AC
Offset
B3-B0
B7-B4
Offset
BB-B8
BF-BC
C3-C0
C7-C4
CB-C8
CF-CC
D3-D0
D7-D4
DB-D8
DF-DC
E3-E0
E7-E4
EB-E8
EF-EC
F3-F0
F7-F4
FB-F8
FF-FC
Offset
1xxxx
Texture Engine Registers
Texture Control
Texture Color
Palette Data
Texture Boundary
Command List Control Registers
-reserved-reservedMemory Interface Registers
Destination Stride & Buffer 0
Destination Stride & Buffer 1
Destination Stride & Buffer 2
Destination Stride & Buffer 3
Source Stride & Buffer 0
Source Stride & Buffer 1
Source Stride & Buffer 2
Source Stride & Buffer 3
Z Depth & Buffer
Texture Base Level 0 (1:1 Map)
Texture Base Level 1
Texture Base Level 2
Texture Base Level 3
Texture Base Level 4
Texture Base Level 5
Texture Base Level 6
Texture Base Level 7
Texture Base Level 8 (mallest)
Data Port Area
Data Port Area
Default
—
—
—
—
Default
—
—
Default
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Default
—
Acc
RW
RW
W
RW
Acc
—
—
Acc
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Acc
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Miscellaneous I/O
Configuration Space I/O
One I/O port is defined in the ProMedia: Port 22.
All registers in the ProMedia (listed above) are addressed via
the following configuration mechanism:
Port 22 – PCI /AGP Arbiter Disable ............................... RW
........................................ always reads 0
7-2 Reserved
1
AGP Arbiter Disable
0 Respond to GREQ# signal .....................default
1 Do not respond to GREQ# signal
0
PCI Arbiter Disable
0 Respond to all REQ# signals..................default
1 Do not respond to any REQ# signals, including
PREQ#
This port can be enabled for read/write access by setting bit-7
of Device 0 Configuration Register 78.
Mechanism #1
These ports respond only to double-word accesses. Byte or
word accesses will be passed on unchanged.
Port CFB-CF8 - Configuration Address ......................... RW
31 Configuration Space Enable
0 Disabled................................................. default
1 Convert configuration data port writes to
configuration cycles on the PCI bus
........................................always reads 0
30-24 Reserved
23-16 PCI Bus Number
Used to choose a specific PCI bus in the system
15-11 Device Number
Used to choose a specific device in the system
(devices 0 and 1 are defined)
10-8 Function Number
Used to choose a specific function if the selected
device supports multiple functions (only function 0 is
defined).
7-2 Register Number (also called the "Offset")
Used to select a specific DWORD in the
configuration space
........................................always reads 0
1-0 Fixed
Port CFF-CFC - Configuration Data .............................. RW
Refer to PCI Bus Specification Version 2.2 for further details
on operation of the above configuration registers.
Revision 1.3 September 8, 1999
-33-
Register Summary Tables
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 7-6 - Status ........................................... RWC
15 Detected Parity Error
0 No parity error detected ......................... default
1 Error detected in either address or data phase.
This bit is set even if error response is disabled
(command register bit-6). ......write one to clear
14 Signaled System Error (SERR# Asserted)
........................................always reads 0
13 Signaled Master Abort
0 No abort received .................................. default
1 Transaction aborted by the master ...................
....................................write one to clear
12 Received Target Abort
0 No abort received .................................. default
1 Transaction aborted by the target......................
....................................... write 1 to clear
11 Signaled Target Abort........................always reads 0
0 Target Abort never signaled
10-9 DEVSEL# Timing
00 Fast
01 Medium....................................always reads 01
10 Slow
11 Reserved
8
Data Parity Error Detected
0 No data parity error detected ................. default
1 Error detected in data phase. Set only if error
response enabled via command bit-6 = 1 and
VT8601 was initiator of the operation in which
the error occurred. .................write one to clear
7
Fast Back-to-Back Capable ...............always reads 1
........................................always reads 0
6
Reserved
5
66MHz Capable..................................always reads 0
4
Supports New Capability list.............always reads 1
........................................always reads 0
3-0 Reserved
Register Descriptions
Device 0 Bus 0 Header Registers - Host Bridge
All registers are located in PCI configuration space. They
should be programmed using PCI configuration mechanism 1
through CF8 / CFC with bus number, function number, and
device number equal to zero.
Device 0 Offset 1-0 - Vendor ID ........................................RO
15-0 ID Code (reads 1106h to identify VIA Technologies)
Device 0 Offset 3-2 - Device ID..........................................RO
15-0 ID Code (reads 0601h to identify the VT8601)
Device 0 Offset 5-4 - Command........................................ RW
........................................ always reads 0
15-10 Reserved
9
Fast Back-to-Back Cycle Enable ........................ RO
0 Fast back-to-back transactions only allowed to
the same agent ........................................default
1 Fast back-to-back transactions allowed to
different agents
8
SERR# Enable...................................................... RO
0 SERR# driver disabled ...........................default
1 SERR# driver enabled
(SERR# is used to report parity errors if bit-6 is set).
7
Address / Data Stepping ...................................... RO
0 Device never does stepping....................default
1 Device always does stepping
6
Parity Error Response........................................RW
0 Ignore parity errors & continue ..............default
1 Take normal action on detected parity errors
5
VGA Palette Snoop .............................................. RO
0 Treat palette accesses normally ..............default
1 Don’t respond to palette accesses on PCI bus
4
Memory Write and Invalidate Command.......... RO
0 Bus masters must use Mem Write ..........default
1 Bus masters may generate Mem Write & Inval
3
Special Cycle Monitoring .................................... RO
0 Does not monitor special cycles .............default
1 Monitors special cycles
2
Bus Master .......................................................... RO
0 Never behaves as a bus master
1 Can behave as a bus master ....................default
1
Memory Space...................................................... RO
0 Does not respond to memory space
1 Responds to memory space ....................default
0
I/O Space .......................................................... RO
0 Does not respond to I/O space ...............default
1 Responds to I/O space
Revision 1.3 September 8, 1999
Device 0 Offset 8 - Revision ID ......................................... RO
7-0 VT8601 Chip Revision Code
Device 0 Offset 9 - Programming Interface ..................... RO
7-0 Interface Identifier ...........................always reads 00
Device 0 Offset A - Sub Class Code .................................. RO
7-0 Sub Class Code .......reads 00 to indicate Host Bridge
Device 0 Offset B - Base Class Code................................. RO
7-0 Base Class Code.. reads 06 to indicate Bridge Device
Device 0 Offset D - Latency Timer .................................. RW
Specifies the latency timer value in PCI bus clocks.
7-3
2-0
-34-
Guaranteed Time Slice for CPU................default=0
Reserved (fixed granularity of 8 clks) .. always read 0
Bits 2-1 are writeable but read 0 for PCI specification
compatibility. The programmed value may be read
back in Offset 75 bits 5-4 (PCI Arbitration 1).
Device 0 Bus 0 Header Registers - Host Bridge
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset E - Header Type .......................................RO
7-0 Header Type Code ............reads 00: single function
Device 0 Offset 2D-2C – Subsystem Vendor ID ............. RW
15-0 Subsystem Vendor ID.........................default = 0000
Device 0 Offset F - Built In Self Test (BIST) ....................RO
7
BIST Supported ......reads 0: no supported functions
........................................ always reads 0
6-0 Reserved
Device 0 Offset 2F-2E – Subsystem ID ............................ RW
15-0 Subsystem ID ......................................default = 0000
Device 0 Offset 13-10 - Graphics Aperture Base ............ RW
31-28 Upper Programmable Base Address Bits....... def=0
27-20 Lower Programmable Base Address Bits ...... def=0
These bits behave as if hardwired to 0 if the
corresponding Graphics Aperture Size register bit
(Device 1 Offset 84h) is 0.
Device 0 Offset 37-34 - Capability Pointer ...................... RO
Contains an offset from the start of configuration space.
27 26 25 24 23 22 21 20
7 6 5 4 3 2 1 0
RW RW RW RW RW RW RW RW
RW RW RW RW RW RW RW 0
RW RW RW RW RW RW 0 0
RW RW RW RW RW 0 0 0
RW RW RW RW 0 0 0 0
RW RW RW 0 0 0 0 0
RW RW 0 0 0 0 0 0
RW 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
31-0 AGP Capability List Pointer ........ always reads A0h
(This Register)
(Gr Aper Size)
1M
2M
4M
8M
16M
32M
64M
128M
256M
................................ always reads 00008
19-0 Reserved
Note: The locations in the address range defined by this
register are prefetchable.
Revision 1.3 September 8, 1999
-35-
Device 0 Bus 0 Header Registers - Host Bridge
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Bus 0 Host Bridge Registers
CPU Interface Control
Device 0 Offset 51 – Response Phase Control (00h)....... RW
7
CPU Read DRAM 0WS for Back-to-Back Read
Transactions
0 Disable................................................... default
1 Enable
Setting this bit enables maximum read performance
by allowing continuous 0-wait-state reads for
pipelined line reads. If this bit is not set, there will be
at least 1T idle time between read transactions.
6
CPU Write DRAM 0WS for Back-to-Back Write
Transactions
0 Disable................................................... default
1 Enable
Setting this bit enables maximum write performance
by allowing continuous 0-wait-state writes for
pipelined line writes ands sustained 3T single writes.
If this bit is not set, there will be at least 1T idle time
between write transactions.
5
DRAM Read Request Rate
0 3T
.................................................... default
1 2T
4
Fast Response (HIT/HITM Sampled 1T Earlier)
0 Disable................................................... default
1 Enable
3
Non-Posted IOW
0 Disable................................................... default
1 Enable
2
CPU Read DRAM Prefetch Buffer Depth
0 1-level prefetch buffer ........................... default
1 4-level prefetch buffer
1
CPU-to-DRAM Post-Write Buffer Depth
0 1-level post-write buffer ........................ default
1 4-level post-write buffer
0
Concurrent PCI Master / Host Operation
0 Disable – the CPU bus will be occupied (BPRI
asserted) during the entire PCI operation..... def
1 Enable – the CPU bus is only requested before
ADS# assertion
Device 0 Offset 50 – Request Phase Control (00h) ......... RW
7
CPU Hardwired IOQ (In Order Queue) Size
Default per strap on pin MA11 during reset. This
register bit can be written to 0 to restrict the chip to
one level of IOQ.
0 1-Level
1 4-Level ....... default if no external strap resistor
6
Read-Around-Write
0 Disable ...................................................default
1 Enable
........................................ always reads 0
5
Reserved
4
Defer Retry When HLOCK Active
0 Disable ...................................................default
1 Enable
Note: always set this bit to 1
........................................ always reads 0
3-2 Reserved
1
Fast Speculative Read
0 Disable ...................................................default
1 Enable
0
CPU / PCI Master Read DRAM Timing
0 Start DRAM read after snoop complete ...... def
1 Start DRAM read before snoop complete
Revision 1.3 September 8, 1999
-36-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 52 – Dynamic Defer Timer (10h) ........... RW
7
GTL I/O Buffer Pullup ...........default = MA13 Strap
0 Disable
1 Enable
The default value of this bit is determined by a strap
on the MA13 pin during reset.
6
RAW Write Retire After 2 Writes
0 Disable ...................................................default
1 Enable
........................................ always reads 0
5
Reserved
4-0 Snoop Stall Count
00 Disable dynamic defer
01-1F Snoop stall count ........................ default = 10h
Revision 1.3 September 8, 1999
Device 0 Offset 53 – Miscellaneous (00h) ........................ RW
7
HREQ Function
0 Disable................................................... default
1 Enable
6
DRAM Frequency Higher Than CPU FSB
0 Disable................................................... default
1 Enable
Setting this bit enables the DRAM subsystem to run at
a higher frequency than the CPU FSB frequency.
When setting this bit, register bit Rx69[6] must also be
set and only SDRAM memory type DIMM modules
may be installed. An EDO / SDRAM mix in the
DRAM subsystem is not supported in this case.
5
AGP/PCI-to-CPU Master / CPU-to-PCI Slave
Concurrency
0 Disable................................................... default
1 Enable
4
HPRI Function
0 Disable................................................... default
1 Enable
3
P6Lock Function
0 Disable................................................... default
1 Enable
2
P6Lock
0 Disable................................................... default
1 Enable
........................................always reads 0
1-0 Reserved
-37-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 55-54 - Non-Cacheable Region #1 ......... RW
15-3 Base Address - A<28:16>........................... default=0
As noted below, the base address must be a multiple
of the region size.
2-0 Range (Region Size)
000 Disable ...................................................default
001 64K
010 128K (Base Address A16 must be 0)
011 256K (Base Address A16-17 must be 0)
100 512K (Base Address A16-18 must be 0)
101 1M (Base Address A16-19 must be 0)
110 2M (Base Address A16-20 must be 0)
111 4M (Base Address A16-21 must be 0)
DRAM Control
These registers are normally set at system initialization time
and not accessed after that during normal system operation.
Some of these registers, however, may need to be
programmed using specific sequences during power-up
initialization to properly detect the type and size of installed
memory (refer to the VIA Technologies VT8601 BIOS
porting guide for details).
Table 3. System Memory Map
Space Start
DOS
0
VGA 640K
BIOS 768K
BIOS 784K
BIOS 800K
BIOS 816K
BIOS 832K
BIOS 848K
BIOS 864K
BIOS 880K
BIOS 896K
BIOS 960K
Sys
1MB
Bus D Top
Init 4G-64K
Device 0 Offset 57-56 - Non-Cacheable Region #2 ......... RW
15-3 Base Address MSBs - A<28:16>................ default=0
As noted below, the base address must be a multiple
of the region size.
2-0 Range (Region Size)
000 Disable ...................................................default
001 64K
010 128K (Base Address A16 must be 0)
011 256K (Base Address A16-17 must be 0)
100 512K (Base Address A16-18 must be 0)
101 1M (Base Address A16-19 must be 0)
110 2M (Base Address A16-20 must be 0)
111 4M (Base Address A16-21 must be 0)
Revision 1.3 September 8, 1999
-38-
Size
640K
128K
16K
16K
16K
16K
16K
16K
16K
16K
64K
64K
—
Address Range
00000000-0009FFFF
000A0000-000BFFFF
000C0000-000C3FFF
000C4000-000C7FFF
000C8000-000CBFFF
000CC000-000CFFFF
000D0000-000D3FFF
000D4000-000D7FFF
000D8000-000DBFFF
000DC000-000DFFFF
000E0000-000EFFFF
000F0000-000FFFFF
00100000-DRAM Top
DRAM Top-FFFEFFFF
64K FFFEFFFF-FFFFFFFF
Comment
Cacheable
Used for SMM
Shadow Ctrl 1
Shadow Ctrl 1
Shadow Ctrl 1
Shadow Ctrl 1
Shadow Ctrl 2
Shadow Ctrl 2
Shadow Ctrl 2
Shadow Ctrl 2
Shadow Ctrl 3
Shadow Ctrl 3
Can have hole
000Fxxxx alias
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 59-58 - DRAM MA Map Type............... RW
15-13 Bank 5/4 MA Map Type (EDO/FPG)
000 8-bit Column Address
001 9-bit Column Address
010 10-bit Column Address ..........................default
011 11-bit Column Address
100 12-bit Column Address (64Mb)
101 Reserved
11x Reserved
Bank 5/4 MA Map Type (SDRAM)
0xx 16Mb SDRAM .......................................default
100 64/128Mb SDRAM (x4, x8, x16, 4-bank x32)
101 64Mb VC SDRAM(x4)
110 64/128Mb VC SDRAM (8Mx8 or 8Mx16)
111 128Mb VC SDRAM (16Mx8)
12 Bank 5/4 Virtual Channel Enable............. default=0
11-8 Reserved
Device 0 Offset 60 – DRAM Type ................................... RW
........................................always reads 0
7-6 Reserved
5-4 DRAM Type for Bank 5/4
00 Fast Page Mode DRAM (FPG).............. default
01 EDO DRAM (EDO)
10 Reserved
11 SDRAM
3-2 DRAM Type for Bank 3/2.....................default=FPG
1-0 DRAM Type for Bank 1/0.....................default=FPG
Table 4. Memory Address Mapping Table
EDO/FP DRAM
MA: 13 12 11 10 9 8 7 6 5
8-bit Col
23 22 21 11 20 19 18 17
(000)
10 9 8
9-bit Col
24 23 22 21 20 19 18 17
11 10 9 8
(001)
10-bit Col
25 24 23 21 20 19 18 17
22 11 10 9 8
(010)
11-bit Col
26 25 23 21 20 19 18 17
(011)
24 22 11 10 9 8
12-bit Col
27 25 23 21 20 19 18 17
(100)
26 24 22 11 10 9 8
........................................ always reads 0
7-5
4
Bank 1/0 MA Map Type (see above)
Bank 1/0 Virtual Channel Enable............. default=0
3-1
0
Bank 3/2 MA Map Type (see above)
Bank 3/2 Virtual Channel Enable............. default=0
4
16
7
16
7
16
7
16
7
16
7
3
15
6
15
6
15
6
15
6
15
6
2
14
5
14
5
14
5
14
5
14
5
1
13
4
13
4
13
4
13
4
13
4
0
12
3
12
3
12
3
12
3
12
3
4
16
7
16
7
3
15
6
15
6
2
14
5
14
5
1
13
4
11
4
0
12
3
23
3
Row Bits
Col Bits
Row Bits
Col Bits
Row Bits
Col Bits
Row Bits
Col Bits
Row Bits
Col Bits
SDRAM
MA: 13 12 11
16Mb (0xx)
11
11
64Mb (100) 24 13 12
2/4 bank
24 13 12
x4, x8, x16;
4-bank x32
Device 0 Offset 5A-5F – DRAM Row Ending Address:
All of the registers in this group default to 01h:
Offset 5A – Bank 0 Ending (HA[30:23]) .................... RW
Offset 5B – Bank 1 Ending (HA[30:23])..................... RW
Offset 5C – Bank 2 Ending (HA[30:23]) .................... RW
10 9 8
22 21 20
PC 24 23
22 21 20
PC 26 25
7
19
10
19
10
6
18
9
18
9
5
17
8
17
8
Row Bits
Col Bits
x4: 10 col
x8: 9 col
x16: 8 col
x32: 8 col
VC SDRAM
Segment address {HA9,HA10,HA25,HA26} depends on VC
SDRAM configurations.
Offset 5D – Bank 3 Ending (HA[30:23]) .................... RW
Offset 5E – Bank 4 Ending (HA[30:23])..................... RW
MA: 13 12 11 10 9 8 7 6 5 4 3 2 1 0
24 13 12 22 21 20 19 18 17 16 15 14 11 23 64M: 4Mx16
64M
VC SDRAM
(101) 6-bit Cola
2-bank
64M/128M
VC SDRAM
(110) 7-bit Cola
2-bank
128M
VC SDRAM
(111) 8-bit Cola
2-bank
Offset 5F – Bank 5 Ending (HA[30:23]) ..................... RW
Note :BIOS is required to fill the ending address registers
for all banks even if no memory is populated. The
endings have to be in incremental order.
(13x6)
24 13 12 PC 26 25 10 9 8 7 6 5 4 3
64M: 8Mx8
(13x7)
24 13 12 PC 26 25 10 9 8 7 6 5 4 3 128M: 8Mx16
(13x7)
24 13 12 22 21 20 19 18 17 16 15 14 11 23 128M: 16Mx8
(13x8)
24 13 12 PC 26 25 10 9 8 7 6 5 4 3
24 13 12 22 21 20 19 18 17 16 15 14 11 23
"PC" = "Precharge Control" (refer to SDRAM specifications)
16Mb 11x10, 11x9, and 11x8 configurations supported
64Mb x4: 12x10 4bank, 13x10 2bank
x8: 12x9 4bank, 13x9 2bank
x16: 12x8 4bank, 13x8 2bank
x32: 11x8 4bank
128Mb same as 64Mb
Revision 1.3 September 8, 1999
-39-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 61 - Shadow RAM Control 1 ................. RW
7-6 CC000h-CFFFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
5-4 C8000h-CBFFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
3-2 C4000h-C7FFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
1-0 C0000h-C3FFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
Device 0 Offset 63 - Shadow RAM Control 3 ................. RW
7-6 E0000h-EFFFFh
00 Read/write disable ................................. default
01 Write enable
10 Read enable
11 Read/write enable
5-4 F0000h-FFFFFh
00 Read/write disable ................................. default
01 Write enable
10 Read enable
11 Read/write enable
3-2 Memory Hole
00 None .................................................... default
01 512K-640K
10 15M-16M (1M)
11 14M-16M (2M)
1-0 SMI Mapping Control
00 Disable SMI Address Redirection ......... default
01 Allow access to DRAM Axxxx-Bxxxx for both
normal and SMI cycles
10 Reserved
11 Allow SMI Axxxx-Bxxxx DRAM access
Device 0 Offset 62 - Shadow RAM Control 2 ................. RW
7-6 DC000h-DFFFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
5-4 D8000h-DBFFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
3-2 D4000h-D7FFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
1-0 D0000h-D3FFFh
00 Read/write disable ..................................default
01 Write enable
10 Read enable
11 Read/write enable
Revision 1.3 September 8, 1999
Note: The A0000-BFFFF address range is reserved
for use by VGA controllers for system access to the
VGA frame buffer. Since frame buffer accesses are
normally directed to the system VGA controller (with
its separate memory subsystem), system DRAM
locations in the A0000-BFFFF range would normally
be unused. Setting the above bits appropriately
allows this block of system memory to be used by
directing Axxxx-Bxxxx accesses to corresponding
memory addresses in system DRAM instead of
directing those accesses to the PCI bus for VGA
frame buffer access.
-40-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 64 - DRAM Timing for Banks 0,1 ......... RW
Device 0 Offset 65 - DRAM Timing for Banks 2,3 ......... RW
Device 0 Offset 66 - DRAM Timing for Banks 4,5 ......... RW
FPG / EDO Settings for Registers 64-66
7
RAS Precharge Time
0 3T
1 4T
.....................................................default
6
RAS Pulse Width
0 4T
1 5T
.....................................................default
5-4 CAS Read Pulse Width
00 1T
01 2T
10 3T
.....................................................default
11 4T
Note: EDO will not automatically reduce the CAS
pulse width. For EDO type DRAMs, use 00 if CAS
width = 1 is to be used.
3
CAS Write Pulse Width
0 1T
1 2T
.....................................................default
2
MA-to-CAS Delay
0 1T
1 2T
.....................................................default
1
RAS to MA Delay
0 1T
.....................................................default
1 2T
........................................ always reads 0
0
Reserved
Device 0 Offset 68 - DRAM Control ............................... RW
7
SDRAM Open Page Control
0 Always precharge SDRAM banks when
accessing EDO/FPG DRAMs ................ default
1 SDRAM banks remain active when accessing
EDO/FPG banks
6
Bank Page Control
0 Allow only pages of the same bank active ... def
1 Allow pages of different banks to be active
5
EDO Pipeline Burst Rate
0 X-2-2-2-2-2-2-2 ..................................... default
1 X-2-2-2-3-2-2-2
4
DRAM Data Latch Delay for EDO/FPG DRAM
0 Latch DRAM data at CCLK rising edge..... def.
1 Delay latch of DRAM data by ½ CCLK
3
EDO Test Mode
0 Disable................................................... default
1 Enable
Note: MD0 is internally pulled up for EDO detection.
2
Burst Refresh
0 Disable................................................... default
1 Enable (burst 4 times)
1-0 System Frequency Divider...................................RO
00 CPU/PCI Frequency Ratio = 2x
(66 MHz)
01 CPU/PCI Frequency Ratio = 3x
(100 MHz)
10 CPU/PCI Frequency Ratio Auto Detect
11 CPU/PCI Frequency Ratio = 4x
(133 MHz)
These bits are latched from MA[14, 12] at the rising
edge of RESET#.
Without external strapping
resistors, the default setting of these bits is 00 (66
MHz).
SDRAM Settings for Registers 64-66
7
Precharge Command to Active Command Period
0 TRP = 2T
1 TRP = 3T ................................................default
6
Active Command to Precharge Command Period
0 TRAS = 5T
1 TRAS = 6T ..............................................default
5-4 CAS Latency
00 1T
01 2T
10 3T
.....................................................default
11 Reserved
3
Reserved (Do Not Program).................... default = 0
2
ACTIVE Command to CMD Command Period
0 2T
1 3T
.....................................................default
1-0 Bank Interleave
00 No Interleave..........................................default
01 2-way
10 4-way
11 Reserved
Revision 1.3 September 8, 1999
-41-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 69 – DRAM Clock Select (00h) .............. RW
7-6 DRAM Operating Frequency Select ................. RW
Rx68[1-0] Rx69[7-6] CPU/DRAM
00
00
66/66
(default)
00
01
66/100
01
00
100/100
01
10
100/66
01
01
100/133
10
00
133/133
10
10
133/100
5
256M bit DRAM Support
0 Disable ...................................................default
1 Enable (DCLKRD becomes output)
4
DRAM Controller Command Register Output
0 Disable ...................................................default
1 Enable
3
Fast DRAM Precharge for Different Bank
0 Disable ...................................................default
1 Enable
2
DRAM 4K Pages (for 64Mbit DRAM)
0 Disable ...................................................default
1 Enable
1
Registered DIMM Support
0 Disable ...................................................default
1 Enable
........................................ always reads 0
0
Reserved
Revision 1.3 September 8, 1999
Device 0 Offset 6A - Refresh Counter ............................. RW
7-0 Refresh Counter (in units of 16 CPUCLKs)
00 DRAM Refresh Disabled....................... default
01 32 CPUCLKs
02 48 CPUCLKs
03 64 CPUCLKs
04 80 CPUCLKs
05 96 CPUCLKs
… …
The programmed value is the desired number of 16CPUCLK units minus one.
Device 0 Offset 6B - DRAM Arbitration Control (01h) RW
7-6 Arbitration Parking Policy
00 Park at last bus owner ............................ default
01 Park at CPU side
10 Park at AGP side
11 Reserved
5
Fast Read to Write Turnaround
0 Disable................................................... default
1 Enable
4
Memory Module Configuration ..........................RO
0 Normal Operation .................................. default
1 Unused Outputs Tristated (RASB#, CASB#,
CKE, MAB, DCLKO)
This bit is latched from MAB7# at the rising edge of
RESET#.
3
MD Bus Second Level Strength Control
0 Normal slew rate control........................ default
1 More slew rate control
2
CAS Second Level Strength Control
0 Normal slew rate control........................ default
1 More slew rate control
1
Virtual Channel-SDRAM
0 Disable................................................... default
1 Enable
0
Multi-Page Open
0 Disable (page registers marked invalid and no
page register update which causes non pagemode operation)
1 Enable .................................................... default
-42-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 6C - SDRAM Control ............................. RW
........................................ always reads 0
7-5 Reserved
4
CKE Configuration
0 Rx6B[4]=0 RASA = CSA, RASB = CSB,
CKE0=CKE0, CKE1 = CKE1
x Rx6B[4]=1 RASA = CSA, RASB = Float,
CASB = Float, MAB = Float,
CKE0 = CKE0, CKE1 = CKE0
1 Rx6B[4]=0 RASA = CSA, RASB = CSB,
CKE3-2 = CSA7-6
CKE5-4 = CSB7-6
CKE1 = GCKE (Global CKE)
CKE0 = FENA (FET Enable)
3
Fast AGP TLB lookup
0 Disable ...................................................default
1 Reduce the lookup time from 4T to 2T
2-0 SDRAM Operation Mode Select
000 Normal SDRAM Mode ..........................default
001 NOP Command Enable
010 All-Banks-Precharge Command Enable
(CPU-to-DRAM cycles are converted
to All-Banks-Precharge commands).
011 MSR Enable
CPU-to-DRAM cycles are converted to
commands and the commands are driven on
MA[13:0]. The BIOS selects an appropriate
host address for each row of memory such that
the right commands are generated on
MA[13:0].
100 CBR Cycle Enable (if this code is selected,
CAS-before-RAS refresh is used; if it is not
selected, RAS-Only refresh is used)
101 Reserved
11x Reserved
Device 0 Offset 6D - DRAM Drive Strength................... RW
........................................always reads 0
7
Reserved
6-5 Delay DRAM Read Latch
00 Disable................................................... default
01 0.5 ns
10 1.0 ns
11 1.5 ns
4
MD Drive
0 6 mA .................................................... default
1 8 mA
3
SDRAM Command Drive Strength
(SRAS#, SCAS#, SWE#)
0 16mA .................................................... default
1 24mA
2
MA[2:13] / WE# Drive Strength
0 16mA .................................................... default
1 24mA
1
CAS# Drive Strength
0 8 mA .................................................... default
1 12 mA
0
RAS# Drive Strength
0 16mA .................................................... default
1 24mA
Rx6B[0] Rx64-66[1-0] Rx68[7-6] Remark
0
00
00
Non-page mode, every access starts
from precharge-active cmd
1
00
00
Only one page active at a time
(recommended setting)
1
01 or 10
00
Only allow sub-bank of a SDRAM
bank active at a time, # of subbank
depends on Rx64-66<1:0>
1
01 or 10
01
Allow mutliple sub-banks across
different SDRAM banks active, but
if EDO is accessed, all SDRAM
pages will be closed
1
01 or 10
11
Allow maximum 8 pages of
SDRAM, EDO opened
Revision 1.3 September 8, 1999
-43-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
PCI Bus Control
These registers are normally programmed once at system
initialization time.
Device 0 Offset 70 - PCI Buffer Control ......................... RW
7
CPU to PCI Post-Write
0 Disable ...................................................default
1 Enable
6
PCI Master to DRAM Post-Write
0 Disable ...................................................default
1 Enable
5
Reserved
4
PCI Master to DRAM Prefetch Disable
0 Enable.....................................................default
1 Disable
3
CPU-to-PCI Buffer Available Cycle Reduction
0 Normal operation ...................................default
1 Reduce 1 cycle when the CPU-to-PCI buffer
becomes available after being full (PCI and
AGP buses)
2
PCI Master Read Caching
0 Disable ...................................................default
1 Enable
1
Delay Transaction
0 Disable ...................................................default
1 Enable
0
Slave Device Stopped Idle Cycle Reduction
0 Normal Operation...................................default
1 Reduce 1 PCI idle cycle when stopped by a
slave device (PCI and AGP buses)
Revision 1.3 September 8, 1999
Device 0 Offset 71 - CPU to PCI Flow Control 1 ........... RW
7
Dynamic Burst
0 Disable................................................... default
1 Enable (see note under bit-3 below)
6
Byte Merge
0 Disable................................................... default
1 Enable
5
Reserved (do not program) ........................default = 0
4
PCI I/O Cycle Post Write
0 Disable................................................... default
1 Enable
3
PCI Burst
0 Disable................................................... default
1 Enable (bit7=1 will override this option)
bit-7 bit-3 Operation
0
0
Every write goes into the write buffer and no
PCI burst operations occur.
0
1
If the write transaction is a burst transaction,
the information goes into the write buffer and
burst transfers are later performed on the PCI
bus. If the transaction is not a burst, PCI write
occurs immediately (after a write buffer flush).
1
x
Every write transaction goes to the write
buffer; burstable transactions will then burst
on the PCI bus and non-burstable won’t. This
is the normal setting.
2
PCI Fast Back-to-Back Write
0 Disable................................................... default
1 Enable
1
Quick Frame Generation
0 Disable................................................... default
1 Enable
0
1 Wait State PCI Cycles
0 Disable................................................... default
1 Enable
-44-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 72 - CPU to PCI Flow Control 2......... RWC
7
Retry Status
0 Retry occurred less than retry limit ........default
1 Retry occurred more than x times (where x is
defined by bits 5-4) .................write 1 to clear
6
Retry Timeout Action
0 Retry Forever (record status only)..........default
1 Flush buffer for write or return all 1s for read
5-4 Retry Limit
00 Retry 2 times ..........................................default
01 Retry 16 times
10 Retry 4 times
11 Retry 64 times
3
Clear Failed Data and Continue Retry
0 Flush the entire post-write buffer ...........default
1 When data is posting and master (or target)
abort fails, pop the failed data if any, and keep
posting
2
CPU Backoff on PCI Read Retry Failure
0 Disable ...................................................default
1 Backoff CPU when reading data from PCI and
retry fails
1
Reduce 1T for FRAME# Generation
0 Disable ...................................................default
1 Enable
0
Reduce 1T for CPU Read of PCI Slave
0 Disable ..................................................Default
1 Enable
Revision 1.3 September 8, 1999
Device 0 Offset 73 - PCI Master Control 1 ..................... RW
........................................always reads 0
7
Reserved
6
PCI Master 1-Wait-State Write
0 Zero wait state TRDY# response........... default
1 One wait state TRDY# response
5
PCI Master 1-Wait-State Read
0 Zero wait state TRDY# response........... default
1 One wait state TRDY# response
4
Disable Prefetch when Doing Delay Transaction
0 Enable .................................................... default
1 Disable
3
Assert STOP# after PCI Master Write Timeout
0 Disable................................................... default
1 Enable
2
Assert STOP# after PCI Master Read Timeout
0 Disable................................................... default
1 Enable
1
LOCK# Function
0 Disable................................................... default
1 Enable
0
PCI Master Broken Timer Enable
0 Disable................................................... default
1 Enable. Force into arbitration when there is no
FRAME# 16 PCICLK’s after the grant. Does
not apply to south bridge PREQ# input
Device 0 Offset 74 - PCI Master Control 2 ..................... RW
7
PCI Master Read Prefetch by Enhance Command
0 Always Prefetch..................................... default
1 Prefetch only if Enhance command
6
PCI Master Write Merge
0 Disable................................................... default
1 Enable
........................................always reads 0
5
Reserved
4
Dummy Request Handling............Should be set to 1
0 As VP3................................................... default
1 Complete Fix
3
PCI Delay Transaction Time-Out
0 Disable................................................... default
1 Enable
2
Backoff CPU Immediately on CPU to AGP Retry
0 Disable................................................... default
1 Enable
1-0 CPU/PCI Master Latency Timer Control
00 AGP Master Reloads MLT timer........... default
01 Falling edge of AGP Master Request reloads
MLT timer
10 Rising Edge of AGP Master Request clears
MLT timer and falling edge reloads the timer
11 Reserved (illegal setting)
-45-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 75 - PCI Arbitration 1 ............................ RW
7
Arbitration Mechanism
0 PCI has priority ......................................default
1 Fair arbitration between PCI and CPU
6
Arbitration Mode
0 REQ-based (arbitrate at end of REQ#)...default
1 Frame-based (arbitrate at FRAME# assertion)
5-4 Latency Timer ........... read only, reads Rx0D bits 2:1
3-0 PCI Master Bus Time-Out
(force into arbitration after a period of time)
0000 Disable ...................................................default
0001 1x32 PCLKs
0010 2x32 PCLKs
0011 3x32 PCLKs
0100 4x32 PCLKs
... ...
1111 15x32 PCLKs
Device 0 Offset 76 - PCI Arbitration 2............................ RW
7
CPU-to-PCI Post-Write Retry Failed
0 Continue retry attempt ........................... default
1 Go to arbitration
6
CPU Latency Timer Bit-0 ....................................RO
0 CPU has at least 1 PCLK time slot when CPU
has PCI bus ............................................ default
1 CPU has no time slot
5-4 Master Priority Rotation Control
00 Disabled (arbitration per Rx75 bit-7)..... default
01 Grant to CPU after every PCI master grant
10 Grant to CPU after every 2 PCI master grants
11 Grant to CPU after every 3 PCI master grants
With setting 01, the CPU will always be granted
access after the current bus master completes, no
matter how many PCI masters are requesting. With
setting 10, if other PCI masters are requesting during
the current PCI master grant, the highest priority
master will get the bus after the current master
completes, but the CPU will be guaranteed to get the
bus after that master completes. With setting 11, if
other PCI masters are requesting, the highest priority
will get the bus next, then the next highest priority
will get the bus, then the CPU will get the bus. In
other words, with the above settings, even if multiple
PCI masters are continuously requesting the bus, the
CPU is guaranteed to get access after every master
grant (01), after every other master grant (10) or after
every third master grant (11).
3-2 High Priority REQ Select
00 REQ4 .................................................... default
01 REQ0
10 REQ1
11 REQ2
1
CPU-to-PCI QW High DW Read Access to PCI
Slave Allow Backoff
0 Disable................................................... default
1 Enable
0
High Priority Request Support
0 Disable................................................... default
1 Enable
Device 0 Offset 77 - Chip Test Mode ............................... RW
7-6 Reserved (no function) .......................always reads 0
5-0 Reserved (do not use) .................................default=0
Revision 1.3 September 8, 1999
-46-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 78 - PMU Control 1 ................................ RW
7
I/O Port 22 Access
0 CPU access to I/O address 22h is passed on to
the PCI bus .............................................default
1 CPU access to I/O address 22h is processed
internally
6
Suspend Refresh Type
0 CBR Refresh ..........................................default
1 Self Refresh
........................................ always reads 0
5
Reserved
4
Dynamic Clock Control
0 Normal (clock is always running)...........default
1 Clock to various internal functional blocks is
disabled when those blocks are not being used
........................................ always reads 0
3
Reserved
2
AGPSTP# Control
0 Disable ...................................................default
1 Enable
........................................ always reads 0
1
Reserved
0
Memory Clock Enable (CKE) Function
0 CKE Disable (pins used as MECC[2-0])..... def
1 CKE Enable (pins used for CKE[2-0]#)
Device 0 Offset 7A – Miscellaneous Control .................. RW
7
No Time-Out Arbitration for Consecutive Frame
Accesses
0 Enable .................................................... default
1 Disable
........................................always reads 0
6-4 Reserved
3
Background PCI-to-PCI Write Cycle Mode
0 Enable .................................................... default
1 Disable
........................................always reads 0
2-1 Reserved
0
South Bridge PCI Master Force Timeout When
PCI Master Occupancy Timer Is Up
0 Disable................................................... default
1 Enable
Device 0 Offset 7E – PLL Test Mode .............................. RW
7-6 Reserved (status) ..................................................RO
5-0 Reserved (do not use) .................................default=0
Device 0 Offset 7F – PLL Test Mode .............................. RW
7-0 Reserved (do not use) .................................default=0
Device 0 Offset 79 – PMU Control 2................................ RW
7
CPU Interface Controller Dynamic Clock
Stopping
0 Disable ...................................................default
1 Enable
6
DRAM Controller Dynamic Clock Stopping
0 Disable ...................................................default
1 Enable
5
AGP Controller Dynamic Clock Stopping
0 Disable ...................................................default
1 Enable
4
PCI Interface Controller Dynamic Clock Stopping
0 Disable ...................................................default
1 Enable
3
Pseudo Power Good
0 Disable ...................................................default
1 Enable
2
South Bridge has High Priority
0 Disable ...................................................default
1 Enable
........................................ always reads 0
1-0 Reserved
Revision 1.3 September 8, 1999
-47-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GART / Graphics Aperture Control
The function of the Graphics Address Relocation Table
(GART) is to translate virtual 32-bit addresses issued by an
AGP device into 4K-page based physical addresses for system
memory access. In this translation, the upper 20 bits (A31A12) are remapped, while the lower 12 address bits (A11-A0)
are used unchanged.
Since address translation using the above scheme requires an
access to system memory, an on-chip cache (called a
"Translation Lookaside Buffer" or TLB) is utilized to enhance
performance. The TLB in the 82C501 contains 16 entries.
Address "misses" in the TLB require an access of system
memory to retrieve translation data. Entries in the TLB are
replaced using an LRU (Least Recently Used) algorithm.
A one-level fully associative lookup scheme is used to
implement the address translation. In this scheme, the upper
20 bits of the virtual address are used to point to an entry in a
page table located in system memory. Each page table entry
contains the upper 20 bits of a physical address (a "physical
page" address). For simplicity, each page table entry is 4
bytes. The total size of the page table depends on the GART
range (called the "aperture size") which is programmable in
the VT8601.
Addresses are translated only for accesses within the
"Graphics Aperture" (GA). The Graphics Aperture can be any
power of two in size from 1MB to 256MB (i.e., 1MB, 2MB,
4MB, 8MB, etc). The base of the Graphics Aperture can be
anywhere in the system virtual address space on an address
boundary determined by the aperture size (e.g., if the aperture
size is 4MB, the base must be on a 4MB address boundary).
The Graphics Aperture Base is defined in register offset 10 of
device 0. The Graphics Aperture Size and TLB Table Base
are defined in the following register group (offsets 84 and 88
respectively) along with various control bits.
This scheme is shown in the figure below.
31
12 11
Virtual Page Address
0
Page Offset
index
TLB Base
Page Table
31
12 11
Physical Page Address
0
Page Offset
Figure 4. Graphics Aperture Address Translation
Revision 1.3 September 8, 1999
-48-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset 84 - Graphics Aperture Size .................. RW
7-0 Graphics Aperture Size
11111111 1M
11111110 2M
11111100 4M
11111000 8M
11110000 16M
11100000 32M
11000000 64M
10000000 128M
00000000 256M
Device 0 Offset 83-80 - GART/TLB Control................... RW
........................................ always reads 0
31-16 Reserved
15-8 Reserved (test mode status)................................. RO
7
Flush Page TLB
0 Disable ...................................................default
1 Enable
6-4
Reserved (always program to 0) ........................ RW
3
PCI Master Address Translation for GA Access
0 Addresses generated by PCI Master accesses
of the Graphics Aperture will not be translateddefaultOffset 8B-88 - GA Translation Table Base ..................... RW
31-12 Graphics Aperture Translation Table Base
1 PCI Master GA addresses will be translated
Pointer to the base of the translation table in system
2
AGP Master Address Translation for GA Access
memory used to map addresses in the aperture range
0 Addresses generated by AGP Master accesses
(the pointer to the base of the "Directory" table).
of the Graphics Aperture will not be translateddefault
........................................always reads 0
11-3
Reserved
1 AGP Master GA addresses will be translated
2
One
Cycle
TLB
Flush Command
1
CPU Address Translation for GA Access
0 Disable................................................... default
0 Addresses generated by CPU accesses of the
1 Enable ................................... should be set to 1
Graphics Aperture will not be translated ..... def
1
Graphics Aperture Enable
1 CPU GA addresses will be translated
0 Disable................................................... default
0
AGP Address Translation for GA Access
1 Enable Graphics Aperture Address [31:28]
0 Addresses generated by AGP accesses of the
Note: To disable the Graphics Aperture, set this bit
Graphics Aperture will not be translated ..... def
to 0 and set all bits of the Graphics Aperture Size to
1 AGP GA addresses will be translated
0. To enable the Graphics Aperture, set this bit to 1
Note: For any master access to the Graphics Aperture range,
and program the Graphics Aperture Size to the
snoop will not be performed.
desired aperture size.
........................................always reads 0
0
Reserved
Note: If TLB miss, the TLB table is fetched by the address:
Gr Ap Trans Table Base [31:12] + A[27:22], A[21:12], 2’b00
Revision 1.3 September 8, 1999
-49-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
AGP Control
Device 0 Offset A3-A0 - AGP Capability Identifier ........RO
...................................... always reads 00
31-24 Reserved
23-20 Major Specification Revision ..... always reads 0001
Major revision # of AGP spec device conforms to
19-16 Minor Specification Revision ..... always reads 0000
Minor revision # of AGP spec device conforms to
15-8 Pointer to Next Item........ always reads 00 (last item)
.. (always reads 02 to indicate it is AGP)
7-0 AGP ID
Device 0 Offset AC - AGP Control .................................. RW
...................................... always reads 0s
7
Reserved
6
AGP Read Synchronization
0 Disable................................................... default
1 Enable (the CPU to AGP cycle will be delayed
if the CMFIFO contains a GART access)
5
AGP Read Snoop CMFIFO
0 Disable................................................... default
1 Enable (AGP read address will snoop the
CMFIFO; if hit, AGP read will be started after
the write is retired)
4
AGP Master Request has Higher Priority if AGP
Controller is Parking at AGP Master
0 Disable................................................... default
1 Enable
3
2X Rate Supported (read also at RxA4[1])
0 Not supported ........................................ default
1 Supported
2
LPR In-Order Access (Force Fence)
0 Fence/Flush functions not guaranteed. AGP
read requests (low/normal priority and high
priority) may be executed before previously
issued write requests. ............................. default
1 Force all requests to be executed in order
(automatically enables Fence/Flush functions).
Low (i.e., normal) priority AGP read requests
will never be executed before previously
issued writes. High priority AGP read requests
may still be executed prior to previously issued
write requests as required.
1
AGP Arbitration Parking
0 Disable................................................... default
1 Enable (GGNT# remains asserted until either
GREQ# de-asserts or data phase ready)
0
2T AGP to DRAM Request Generation
0 Disable................................................... default
1 Enable
Device 0 Offset A7-A4 - AGP Status.................................RO
31-24 Maximum AGP Requests ................ always reads 07
Max # of AGP requests the device can manage (8)
.......................................always reads 0s
23-10 Reserved
9
Supports SideBand Addressing ........ always reads 1
.......................................always reads 0s
8-2 Reserved
1
2X Rate Supported
Value returned can be programmed by writing to
RxAC[3]
........................................ always reads 1
0
1X Rate Supported............................. always reads 1
Device 0 Offset AB-A8 - AGP Command ........................ RW
31-24 Request Depth (reserved for target)...always reads 0s
.......................................always reads 0s
23-10 Reserved
9
SideBand Addressing Enable
0 Disable ...................................................default
1 Enable
8
AGP Enable
0 Disable ...................................................default
1 Enable
.......................................always reads 0s
7-2 Reserved
1
2X Mode Enable
0 Disable ...................................................default
1 Enable
0
1X Mode Enable
0 Disable ...................................................default
1 Enable
Device 0 Offset AD – AGP Latency Register.................. RW
...................................... always reads 0s
7-4 Reserved
3-0 AGP Latency Timer(units of 16 GCLKs)
0000 Free Run ................................................ default
Revision 1.3 September 8, 1999
-50-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Offset F7-F0 – BIOS Scratch Register ............. RW
7-0 No Hardware Function
Device 0 Offset FC – Back Door Control 1..................... RW
........................................always reads 0
7-2 Reserved
1
Back-door MAX # of AGP Request Allowed
0 Read RXA7 will return 7 ....................... default
1 Read RxXA7 will have number programmed at
RxFD
0
Back-Door Device ID Enable
0 Use Rx3-2’s value for Rx3-2 read ......... default
1 Use the value in RxFE-FF
Device 0 Offset F8 – DRAM Arbitration Timer 1 .......... RW
7-4 AGP Timer (units of 4 DRAM Clocks)
3-0 Host Timer (units of 4 DRAM Clocks)
Device 0 Offset F9 – DRAM Arbitration Timer 2 .......... RW
7-4 VGA High Priority Timer (units of 16 DRAM
Clocks)
3-0 VGA Timer (units of 16 DRAM Clocks)
Device 0 Offset FD – Back Door Control 2..................... RW
7-3 Reserved
2-0 Back-Door Max # of AGP Requests the Device can
Handle
000 1-Request ............................................... default
001 2-Requests
… …
111 8-Requests
Device 0 Offset FA – CPU Direct Access Frame Buffer
Base Address A[28:21] ...................................................... RW
7-0 A[28:21]
Device 0 Offset FF-FE – Back Door Device ID .............. RW
15-0 Back-Door Device ID................................default = 0
Device 0 Offset FB – Frame Buffer Control ................... RW
7
VGA Enable
0 Disable ...................................................default
1 Enable
6
VGA Reset ................................. (Write 1 to Reset)
5-4 Frame Buffer Size
00 None
.....................................................default
01 2M
10 4M
11 8M
3
CPU Direct Access Frame Buffer
0 Disable ...................................................default
1 Enable
2-0 CPU Direct Access Frame Buffer Base Address
<31:29>
Revision 1.3 September 8, 1999
-51-
Device 0 Bus 0 Host Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 1 Bus 0 Header Registers - PCI-to-AGP Bridge
Device 1 Offset 7-6 - Status (Primary Bus) .................. RWC
15 Detected Parity Error ........................always reads 0
14 Signaled System Error (SERR#) .......always reads 0
13 Signaled Master Abort
0 No abort received .................................. default
1 Transaction aborted by the master with
Master-Abort (except Special Cycles) ..............
....................................... write 1 to clear
12 Received Target Abort
0 No abort received .................................. default
1 Transaction aborted by the target with TargetAbort ....................................... write 1 to clear
11 Signaled Target Abort........................always reads 0
10-9 DEVSEL# Timing
00 Fast
01 Medium....................................always reads 01
10 Slow
11 Reserved
8
Data Parity Error Detected ...............always reads 0
7
Fast Back-to-Back Capable ...............always reads 0
6
User Definable Features.....................always reads 0
5
66MHz Capable..................................always reads 1
4
Supports New Capability list.............always reads 0
........................................always reads 0
3-0 Reserved
All registers are located in PCI configuration space. They
should be programmed using PCI configuration mechanism 1
through CF8 / CFC with bus number and function number
equal to zero and device number equal to one.
Device 1 Offset 1-0 - Vendor ID ........................................RO
15-0 ID Code (reads 1106h to identify VIA Technologies)
Device 1 Offset 3-2 - Device ID..........................................RO
15-0 ID Code (reads 8601h to identify the VT8601 PCIto-PCI Bridge device)
Device 1 Offset 5-4 - Command........................................ RW
........................................ always reads 0
15-10 Reserved
9
Fast Back-to-Back Cycle Enable ........................ RO
0 Fast back-to-back transactions only allowed to
the same agent ........................................default
1 Fast back-to-back transactions allowed to
different agents
8
SERR# Enable...................................................... RO
0 SERR# driver disabled ...........................default
1 SERR# driver enabled
(SERR# is used to report parity errors if bit-6 is set).
7
Address / Data Stepping ...................................... RO
0 Device never does stepping....................default
1 Device always does stepping
6
Parity Error Response........................................RW
0 Ignore parity errors & continue ..............default
1 Take normal action on detected parity errors
5
VGA Palette Snoop .............................................. RO
0 Treat palette accesses normally ..............default
1 Don’t respond to palette writes on PCI bus
(10-bit decode of I/O addresses 3C6-3C9 hex)
4
Memory Write and Invalidate Command.......... RO
0 Bus masters must use Mem Write ..........default
1 Bus masters may generate Mem Write & Inval
3
Special Cycle Monitoring .................................... RO
0 Does not monitor special cycles .............default
1 Monitors special cycles
2
Bus Master .........................................................RW
0 Never behaves as a bus master
1 Enable to operate as a bus master on the
primary interface on behalf of a master on the
secondary interface ................................default
1
Memory Space.....................................................RW
0 Does not respond to memory space
1 Enable memory space access .................default
0
I/O Space .........................................................RW
0 Does not respond to I/O space
1 Enable I/O space access ........................default
Revision 1.3 September 8, 1999
Device 1 Offset 8 - Revision ID ......................................... RO
7-0 VT8601 Chip Revision Code (00=First Silicon)
Device 1 Offset 9 - Programming Interface ..................... RO
This register is defined in different ways for each Base/SubClass Code value and is undefined for this type of device.
7-0
Interface Identifier ...........................always reads 00
Device 1 Offset A - Sub Class Code .................................. RO
7-0 Sub Class Code .reads 04 to indicate PCI-PCI Bridge
Device 1 Offset B - Base Class Code................................. RO
7-0 Base Class Code.. reads 06 to indicate Bridge Device
Device 1 Offset D - Latency Timer ................................... RO
........................................always reads 0
7-0 Reserved
Device 1 Offset E - Header Type ...................................... RO
7-0 Header Type Code.......... reads 01: PCI-PCI Bridge
Device 1 Offset F - Built In Self Test (BIST) ................... RO
7
BIST Supported...... reads 0: no supported functions
6
Start Test .......... write 1 to start but writes ignored
........................................always reads 0
5-4 Reserved
3-0 Response Code ..........0 = test completed successfully
-52-
Device 1 Bus 0 Header Registers - PCI-to-AGP Bridge
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 1 Offset 18 - Primary Bus Number ...................... RW
7-0 Primary Bus Number............................... default = 0
This register is read write, but internally the chip always uses
bus 0 as the primary.
Device 1 Offset 3F-3E – PCI-to-PCI Bridge Control..... RW
........................................always reads 0
15-4 Reserved
3
VGA-Present on AGP
0 Forward VGA accesses to PCI Bus ....... default
1 Forward VGA accesses to AGP Bus
Note: VGA addresses are memory A0000-BFFFFh
and I/O addresses 3B0-3BBh, 3C0-3CFh and 3D03DFh (10-bit decode). "Mono" text mode uses
B0000-B7FFFh and "Color" Text Mode uses B8000BFFFFh. Graphics modes use Axxxxh. Mono VGA
uses I/O addresses 3Bx-3Cxh and Color VGA uses
3Cx-3Dxh. If an MDA is present, a VGA will not
use the 3Bxh I/O addresses and B0000-B7FFFh
memory space; if not, the VGA will use those
addresses to emulate MDA modes.
2
Block / Forward ISA I/O Addresses
0 Forward all I/O accesses to the AGP bus if
they are in the range defined by the I/O Base
and I/O Limit registers (device 1 offset 1C-1D)
.................................................... default
1 Do not forward I/O accesses to the AGP bus
that are in the 100-3FFh address range even if
they are in the range defined by the I/O Base
and I/O Limit registers.
........................................always reads 0
1-0 Reserved
Device 1 Offset 19 - Secondary Bus Number .................. RW
7-0 Secondary Bus Number ........................... default = 0
Note: PCI#2 must use these bits to convert Type 1 to Type 0.
Device 1 Offset 1A - Subordinate Bus Number .............. RW
7-0 Primary Bus Number............................... default = 0
Note: PCI#2 must use these bits to decide if Type 1 to Type 1
command passing is allowed.
Device 1 Offset 1C - I/O Base ........................................... RW
7-4 I/O Base AD[15:12].......................... default = 1111b
3-0 I/O Addressing Capability....................... default = 0
Device 1 Offset 1D - I/O Limit .......................................... RW
7-4 I/O Limit AD[15:12] ................................ default = 0
3-0 I/O Addressing Capability....................... default = 0
Device 1 Offset 1F-1E - Secondary Status ........................RO
.................................. always reads 0000
15-0 Reserved
Device 1 Offset 21-20 - Memory Base .............................. RW
15-4 Memory Base AD[31:20] .................default = 0FFFh
........................................ always reads 0
3-0 Reserved
Device 1 Offset 23-22 - Memory Limit (Inclusive).......... RW
15-4 Memory Limit AD[31:20]........................ default = 0
........................................ always reads 0
3-0 Reserved
Device 1 Offset 25-24 - Prefetchable Memory Base ....... RW
15-4 Prefetchable Memory Base AD[31:20].def = 0FFFh
........................................ always reads 0
3-0 Reserved
Device 1 Offset 27-26 - Prefetchable Memory Limit ...... RW
15-4 Prefetchable Memory Limit AD[31:20] ...................
.............................................. default = 0
........................................ always reads 0
3-0 Reserved
Revision 1.3 September 8, 1999
-53-
Device 1 Bus 0 Header Registers - PCI-to-AGP Bridge
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 1 Bus 0 PCI-to-AGP Bridge Registers
Device 1 Offset 41 - CPU-to-AGP Flow Control 2 ...... RWC
7
Retry Status
0 No retry occurred................................... default
1 Retry Occurred ........................write 1 to clear
6
Retry Timeout Action
0 No action taken except to record status ....... def
1 Flush buffer for write or return all 1s for read
5-4 Retry Count
00 Retry 2, backoff CPU ............................ default
01 Retry 4, backoff CPU
10 Retry 16, backoff CPU
11 Retry 64, backoff CPU
3
Post Write Data on Abort
0 Flush entire post-write buffer on target-abort
or master abort ....................................... default
1 Pop one data output on target-abort or masterabort
2
CPU Backoff on AGP Read Retry Timeout
0 Disable................................................... default
1 Enable
........................................always reads 0
1-0 Reserved
AGP Bus Control
Device 1 Offset 40 - CPU-to-AGP Flow Control 1 ......... RW
7
CPU-AGP Post Write
0 Disable ...................................................default
1 Enable
6
CPU-AGP Dynamic Burst
0 Disable ...................................................default
1 Enable
5
CPU-AGP One Wait State Burst Write
0 Disable ...................................................default
1 Enable
4
AGP to DRAM Prefetch
0 Disable ...................................................default
1 Enable
3
AGP Master Allowed Before CPU-to-AGP Post
Write Buffer is Not Flushed
0 Disable ...................................................default
1 Enable
This option is always enabled for PCI
2
MDA Present on AGP
0 Forward MDA accesses to AGP.............default
1 Forward MDA accesses to PCI
Note: Forward despite IO / Memory Base / Limit
Note:
MDA (Monochrome Display Adapter)
addresses are memory addresses B0000h-B7FFFh
and I/O addresses 3B4-3B5h, 3B8-3BAh, and 3BFh
(10-bit decode). 3BC-3BE are reserved for printers.
Note: If Rx3E bit-3 is 0, this bit is a don't care (MDA
accesses are forwarded to the PCI bus).
1
AGP Master Read Caching
0 Disable ...................................................default
1 Enable
0
AGP Delay Transaction
0 Disable ...................................................default
1 Enable
Device 1 Offset 42 - AGP Master Control ...................... RW
7
Read Prefetch for Enhance Command
0 Always Perform Prefetch ....................... default
1 Prefetch only if Enhance Command
6
AGP Master One Wait State Write
0 Disable................................................... default
1 Enable
5
AGP Master One Wait State Read
0 Disable................................................... default
1 Enable
4
Extend AGP Internal Master for Efficient
Handling of Dummy Request Cycles
0 Disable................................................... default
1 Enable
This bit is normally set to 1.
3
AGP Delay Transaction Timeout
0 Disable................................................... default
1 Enable
2
Prefetch During Delay Transaction
0 Enable .................................................... default
1 Disable
........................................always reads 0
1
Reserved
0
Reserved (do not use) ...............................default = 0
Table 5. VGA/MDA Memory/IO Redirection
3E[3] 40[2] VGA MDA
VGA MDA is
is
Pres. Pres. on
on
0
PCI PCI
1
0 AGP AGP
1
1 AGP PCI
Axxxx, B0000 3Cx,
B8xxx -B7FFF 3Dx 3Bx
Access Access I/O I/O
PCI
PCI PCI PCI
AGP
AGP AGP AGP
AGP
PCI AGP PCI
Revision 1.3 September 8, 1999
-54-
Device 1 Bus 0 PCI-to-AGP Bridge Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Bus 1 Header Registers - Graphics Accelerator
The Apollo ProMedia 2D / 3D Graphics Accelerator is fully
compliant with PCI bus interface protocol revision 2.2. The
controller implements slave functions of PCI to accept cycles
initiated by PCI masters targeted for its internal registers,
RAMDAC™, frame buffer, and/or BIOS. It will accept only
one data transaction for non-memory type transfers; however
burst read/write transfers for frame buffer accesses are also
implemented for performance enhancement. Bursting is
disabled when accessing memory mapped I/O. Data parity
will be generated for read cycles.
The PCI configuration space is fully implemented. Due to the
second memory base register, all I/O registers can be memory
mapped; which allows more than one graphics controller to be
installed within a system by mapping memory and I/O to
different locations.
All configuration registers are located in PCI configuration
space and should be programmed using PCI configuration
mechanism 1 through CF8 / CFC with bus number equal to
one and function number and device number equal to zero.
There are three memory base registers. The first defines the
memory base location for the graphics frame buffer. The
second defines the memory base for the memory mapped I/O
locations. The third defines the memory base for the second
video aperture. With this second aperture, graphics data and
video data can be sent to the ProMedia simultaneously.
To support the PC AT architecture, palette snooping is
supported. There are two different palette snooping modes:
(1) snooping due to PCI retry, and (2) snooping due to master
abort. Both modes are supported. The video BIOS will
automatically determine the correct snooping mode in a PCI
based system during power up. The ProMedia follows the
PCI 2.2 specification running at 33 MHz or lower system
clock frequencies. For packed pixel modes, if the first data
TRDY is not generated within 16 clocks, a retry will be
issued. During bursting, if successful data is not generated
within 8 clocks, a retry will also be issued.
The ProMedia supports the PCI Bus Master mode which can
send captured video data directly to system memory for
processing. The registers to control the PCI Bus Master are
defined in following sections (they are all in PCI configuration
space).
The table below lists the commands implemented by the
ProMedia graphics controller PCI interface. Note that codes
not listed (0000 interrupt acknowledge, 0001 special cycle,
0100, 0101, 1000, 1001 reserved, and 1101 dual address
cycle) are not decoded and DEVSEL# is not generated. No
action takes place inside the chip for these codes.
Offset 1-0 - Vendor ID (1023h) ......................................... RO
................................ always reads 1023h
15-0 ID Code
Table 6. Supported PCI Command Codes
Offset 3-2 - Device ID (8500h) .......................................... RO
................................ always reads 8500h
15-0 ID Code
Command Code Command
0010
0011
0110
0111
1010
1011
1100
1110
1111
I/O Read
I/O Write
Memory Read
Memory Write
Configuration Read
Configuration Write
Memory Read Multiple
(treated as simple memory read)
Memory Read Line
(treated as simple memory read)
Memory Write and Invalid
(treated as simple memory write)
Revision 1.3 September 8, 1999
-55
Device 0 Bus 1 Header Registers - Graphics Accelerator
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Offset 5-4 - Command ....................................................... RW
........................................ always reads 0
15-10 Reserved
9
Fast Back-to-Back Cycle Enable ........................ RO
........... default set from inverse of MA??
0 Fast back-to-back transactions only allowed to
the same agent
1 Fast back-to-back transactions allowed to
different agents
8
SERR# Enable...................................................... RO
0 SERR# driver disabled ...........................default
1 SERR# driver enabled
(SERR# is used to report parity errors if bit-6 is set).
7
Address / Data Stepping ...................................... RO
0 Device never does stepping....................default
1 Device always does stepping
6
Parity Error Response......................................... RO
0 Ignore parity errors & continue ..............default
1 Take normal action on detected parity errors
5
VGA Palette Snoop .............................................RW
0 Treat palette accesses normally ..............default
1 Don’t respond to palette accesses on PCI bus
4
Memory Write and Invalidate Command.......... RO
0 Bus masters must use Mem Write ..........default
1 Bus masters may generate Mem Write & Inval
3
Special Cycle Monitoring .................................... RO
0 Does not monitor special cycles .............default
1 Monitors special cycles
2
Bus Master .........................................................RW
0 Never behaves as a bus master ...............default
1 Can behave as a bus master
1
Memory Space.....................................................RW
0 Does not respond to memory space
1 Responds to memory space ....................default
0
I/O Space .........................................................RW
0 Does not respond to I/O space
1 Responds to I/O space ...........................default
Revision 1.3 September 8, 1999
Offset 7-6 - Status .......................................................... RWC
15 Detected Parity Error
0 No parity error detected ......................... default
1 Error detected in either address or data phase.
This bit is set even if error response is disabled
(command register bit-6). ......write one to clear
14 Signaled System Error (SERR# Asserted)
........................................always reads 0
13 Signaled Master Abort (Bus Master Only)
0 No abort received .................................. default
1 Transaction aborted by the master ...................
....................................write one to clear
12 Received Target Abort (Bus Master Only)
0 No abort received .................................. default
1 Transaction aborted by the target......................
....................................... write 1 to clear
11 Signaled Target Abort........................always reads 0
0 Target Abort never signaled
10-9 DEVSEL# Timing
00 Fast
01 Medium....................................always reads 01
10 Slow
11 Reserved
8
Data Parity Error Detected (Bus Master Only)
0 No data parity error detected .....always reads 0
1 Error detected in data phase
7
Fast Back-to-Back Capable
0 Not capable............................................ default
1 Capable
........................................always reads 0
6
Reserved
5
66MHz Capable..................................always reads 1
4
Supports New Capability list.............always reads 0
........................................always reads 0
3-0 Reserved
-56
Device 0 Bus 1 Header Registers - Graphics Accelerator
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Offset 8 - Revision ID .........................................................RO
8-0 VT8601 Graphics Controller Revision Code
Offset 3C – Interrupt Line ............................................... RW
7-0 Interrupt Line ...................................... default = 0Bh
Offset 9 - Programming Interface .....................................RO
7-0 Interface Identifier........................... always reads 00
Offset 3D – Interrupt Pin .................................................. RO
7-0 Interrupt Pin....................always reads 01h (INTA#)
Offset A - Sub Class Code..................................................RO
7-0 Sub Class Code................................. always reads 00
Interrupts
There are several interrupt sources and their corresponding
controls in the ProMedia as shown in the following table:
Offset B - Base Class Code ................................................RO
7-0 Base Class Code
Reads 03 to indicate Graphics Controller
Table 7. Interrupt Sources and Controls
Source
3
Offset 13-10 - Graphics Memory Base 0 ......................... RW
31-0 Graphics Memory Base 0 ......... default = E000 0000
Defines an 8MB space for display memory
Offset 17-14 - Graphics Memory Base 1 ......................... RW
31-0 Graphics Memory Base 0 ......... default = E080 0000
Defines a 128KB space for memory mapped I/O
1)
2)
3)
Offset 1B-18 - Graphics Memory Base 2 ......................... RW
31-0 Graphics Memory Base 0 ......... default = E040 0000
Defines an 8MB space for off-screen video overlay
4)
5)
Offset 2D-2C – Subsystem Vendor ID ............................. RW
15-0 Subsystem Vendor ID ............................ default = 00
Mask
Clear
Status
1
Capture
CR9B[7] CR9B[6] CR9B[4]
2
Capture VSYNC
2
Capture Even Field
2
Capture Odd Field
2
Capture Blank
4
GE
2122[7] 2122[7] 2120[4]
VGA5
CR11[5] CR11[4]
Write 0 to clear.
Selected by CR9E[7:6]
Video capture logic can generate an interrupt which is
selected from one of four sources determined by
CR9E.[7:6]. This interrupt is enabled by CR9B[7]. To
clear this bit write 0 to CR9B[6]. Whether an interrupt is
generated can be determined from CR9B[4].
The GE interrupt is similar to the capture interrupt.
The VGA interrupt is similar to the capture interrupt except
that there is no status bit.
Offset 2F-2E - Subsystem ID ............................................ RW
15-0 Subsystem ID .......................................... default = 00
Offset 33-30 –Graphics ROM Base.................................. RW
31-0 Graphics ROM Base ................. default = 0000 0001
Revision 1.3 September 8, 1999
-57
Device 0 Bus 1 Header Registers - Graphics Accelerator
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Device 0 Bus 1 Graphics Accelerator Registers
Offset 93-90 – Power Management 1 ................................RO
........................................ always reads 0
31-27 Reserved
PME# not supported
26 D2 State (Suspend) Supported .......... always reads 1
The D2 state is supported
25 D1 State (Standby) Supported .......... always reads 1
The D1 state is supported
........................................ always reads 0
24-22 Reserved
21 Device Specific Initialization ............. always reads 1
Special DSI is required from the video BIOS
........................................ always reads 0
20 Reserved
Auxiliary power source not supported
........................................ always reads 0
19 Reserved
PME# generation not supported
18-16 PCI PM Version # ........................ always reads 001b
15-8 Next Item Pointer ............................... always reads 0
7-0 PCI PM Capable ............................ always reads 01h
This device is PCI PM capable
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Offset 97-94 – Power Management 2 .............................. RW
........................................always reads 0
31-24 Reserved
Power dissipation reporting not supported
........................................always reads 0
23-16 Reserved
15 D3 Cold Supported.............................always reads 0
D3 cold not supported
14-13 Data Scale ........................................always reads 0
Power dissipation reporting not supported
12-9 Power Consumed / Dissipated ...........always reads 0
Power dissipation reporting not supported
........................................always reads 0
8
Reserved
PME# for D3 cold not supported
........................................always reads 0
7-2 Reserved
1-0 Power State
00 Fully On................................................. default
01 Standby
10 Suspend
11 D3hot, similar to suspend
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Port 2300 – Graphics Bus Master Control ..................... RW
........................................always reads 0
31-16 Reserved
15 PCI Master Read Data to GE SRCQ
0 Disable................................................... default
1 Enable
14-11 Bytes in DW to be Cleared
When enabling block transfer with clear, one bits
define which byte(s) in the DW will be cleared
10 Enable Bit with Clear
0 Disable................................................... default
1 Enable
9
Invert C / Z Position
0 Hardware assumes C is located in bits 15:0 and
Z in bits 31:16........................................ default
1 Hardware assumes C is located in bits 31:16
and Z in bits 15:0
8
Enable Z Stripping
0 Disable................................................... default
1 Enable
........................................always reads 0
7-5 Reserved
4
Bus Master Interrupt
0 Disable................................................... default
1 Enable
3
Master Latency
0 Disable................................................... default
1 Enable
2
Write Command ........................................default =0
Writing this bit to 1 will trigger the hardware to begin
a write operation. After finishing the operation,
hardware will automatically clear this bit.
1
Read Command ........................................default =0
Writing this bit to 1 will trigger the hardware to begin
a read operation. After finishing the operation,
hardware will automatically clear this bit.
0
Scatter / Gather
0 Disable................................................... default
1 Enable
The ProMedia PCI Bus Master controller supports both
read/write and scatter/gather. Software can take advantage of
this feature to transfer data between system memory and the
frame buffer. After software sets the proper registers and
commands, the PCI master begins to transfer data
automatically between system memory and the frame buffer.
This allows the CPU to do other jobs at the same time, thus
increasing performance.
Software should use the PCI Bus Master functionality to
transfer big chunks of data such as video capture data for
video conferencing applications or texture data for 3-D
applications. For small chunks of data, direct CPU access to
the Frame Buffer is the preferred method.
The software sequence used to control bus master operation is
as follows: Software first sets registers such as the system
memory starting address, page table starting address / height /
width, and frame buffer starting address and line offset.
Software finally sets the bus master control register where
either bit 1 (for reads) or bit 2 (for writes) is set as the
command bit. After the command bit is set, the hardware will
begin to transfer data automatically based on the parameters
specified. After the transfer is finished, the hardware will
issue an interrupt. Software can then poll the status bit to get
the transfer status. The hardware will clear the command bit
after the transfer is finished. Software cannot issue new
commands until the previous command is completed.
All Registers are memory mapped. The memory address base
is defined in PCI configuration register “Memory Base 1”
(offset 17h-14h).
Port 2204 – Graphics Bus Master Status .........................RO
........................................ always reads 0
31-3 Reserved
2
Bus Master Interrupt Status
1
End of Transfer
0 Still processing .......................................default
1 End of Transfer (Idle)
0
Bus Master Error Status
0 Normal ...................................................default
1 Error Detected
This error is ususlly detected because the total page
table size is less than the size defined in the
“Graphics Bus Master Height” register at index
2314h.
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Port 2310 – Graphics Bus Master System Start Addr ... RW
31-0 System Start Address
If scatter / gather is enabled, bits 31:12 point to the
physical region translation table (the page starting
address must be aligned on 4KB address boundaries)
and bits 11:0 are the offset within a page.
Port 2314 – Graphics Bus Master Height ....................... RW
........................................always reads 0
15-10 Reserved
9-0 Source Data Height
Port 2316 – Graphics Bus Master Width........................ RW
........................................always reads 0
15-12 Reserved
11-0 Source Data Width (in bytes)
Physical Region Descriptor Table
While system memory is allocated in a non-contiguous space,
software needs to provide a physical region description table
in system memory and pass the table's starting address to
hardware.
Port 2318 – Graphics Bus Master FB Start Addr/Pitch RW
31-22 Frame Buffer Line Offset (FB pitch) in quadwords
........................................always reads 0
21-20 Reserved
19-0 Frame Buffer Start Address (quadword aligned)
The table size must less than or equal to 4K bytes and the
table cannot cross the 4K boundary.
Port 231C – Graphics Bus Master System Pitch............ RW
........................................always reads 0
15-12 Reserved
11-0 System Row Byte Offset (pitch) in bytes
Figure 5. Physical Region Descriptor Table Format
BYTE3 |
BYTE2 |
Page 0 physical address
Page 1 physical address
......
Page n physical address
BYTE1
|
BYTE0
|EOT
|EOT
Port 2320 – Graphics Bus Master Clear Data................ RW
31-0 Clear Data Value
Used as the “clear” value for “block transfer with
clear”
|EOT
EOT = End of Table
Each table entry is 4 bytes in length. Hardware assumes that
the physical page is always 4K. Bits 31:2 indicate the
physical page starting address. Bit 0 of the first byte indicates
the end of the table. Bus Master operation terminates when
the last descriptor has been retired.
Figure 6. PCI Bus Master Address Translation
System Start Address
Register at 2210
31 ................ 12 11 ...... 0
Physical Region
Description Table
Physical Memory
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Graphics Accelerator AGP Registers
Command List Format
The command list is stored in AGP memory in groups. Each
group has the following format:
The default base I/O address for the AGP registers is 2300h.
The AGP control unit has 3 channels. These channels can
work independently and in parallel. Each channel has its own
capabilities:
Bit
Bit
31 16
0
QuadWord
63 48 32
0
Data 0
Header
1
Data 2
Data 1
2
Data 4
Data 3
…
…
…
n/2+1
Pad/Data n-1
Data n – 1/2
The header is a 32-bit word that contains information about
this group, such as the amount of useful data in the group. A
group is always padded to a quadword boundary. Padding
DWORDs are discarded by the channel. The format of the
header is as follows:
31 Consecutive Addressing
0 Disabled (all data in this group will be written
to the register with the destination address
specified in the “ADDR” field in bits 29-8)
1 Enabled (All data in this group will be written
to registers ADDR, ADDR+4, … ADDR+4 *
(LEN-1) sequentially
30 Wait
0 Don’t Wait (send data to the Graphics Engine
as long as it can receive it)
1 Wait (until the GE is idle, then send data)
29-8 Register Address of the First Data (ADDR)
15-0 Number of DWORDs of Data in this Group (LEN)
Channel 0: Execution mode texture access.
Channel 1: Command List Operation.
lists from AGP memory.
Executes command
Channel 2: Data Move. Moves data from AGP memory to
frame buffer or to the Capture/MPEG2 FIFO.
Also moves data from the frame buffer to AGP
memory.
Graphics AGP Configuration Registers
Port 2304 – Graphics AGP Capability List ..................... RW
31-0 xx
Port 2334 – Graphics AGP Capability List Address ...... RW
31-0 xx
Graphics AGP Operation Registers
Port 2340 – Graphics AGP FB Command List Start ..... RW
........................................ always reads 0
31-19 Reserved
18-0 Frame Buffer Command List Start Address
Port 2344 – Graphics AGP FB Command List Size ....... RW
........................................ always reads 0
31-19 Reserved
18-3 Frame Buffer Command List Size (in quadwords)
Value programmed is the desired size minus one
........................................ always reads 0
2-0 Reserved
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Port 2348 – Graphics AGP Channel 1 FB Start/Pitch ... RW
31-22 Frame Buffer Line Offset (in quadwords)
........................................ always reads 0
21-19 Reserved
18-0 Frame Buffer Starting Address
Port 2364 –Channel Arbitration Counter Threshold .... RW
........................................always reads 0
31-28 Reserved
26-24 Channel 2 System Arbitration Threshold
23-20 Channel 2 System Arbitration Threshold
19-16 Channel 2 System Arbitration Threshold
........................................always reads 0
15-12 Reserved
11-8 ??
7-0 ??
Port 234C – Graphics AGP Channel 1 FB Size .............. RW
31-13 X Direction (in quadwords minus one)
........................................ always reads 0
12-10 Reserved
9-0 Y Direction (in pixels minus one)
Port 2368 – Graphics AGP Channel I/O Control .......... RW
........................................always reads 0
31-27 Reserved
26 Reserved (Do not Program).......................must be 0
........................................always reads 0
25 Reserved
24 Reserved (Do not Program).......................must be 0
........................................always reads 0
23-22 Reserved
21-20 Reserved (Do not Program).....................must be 01
19 Channel 1 Read Enable
0 Disable................................................... default
1 Enable
18 Channel 1 Interrupt Enable
0 Disable................................................... default
1 Enable
17 Channel 1 Destination Select
0 Frame Buffer.......................................... default
1 GE Command FIFO
16 Channel 1 Enable
0 Disable................................................... default
1 Enable
........................................always reads 0
15-1 Reserved
0
Channel 0 Enable
0 Disable................................................... default
1 Enable
Port 2350 – Graphics AGP Channel 1 System Start ...... RW
31-3 Channel 1 System Memory Start Address
(quadword aligned)
........................................ always reads 0
2-1 Reserved
0
Command List Operation Trigger
This bit is the same as bit-19 of register 2368h
(Channel 1 Read Enable). It is used to trigger
command list operation and force bit-17 of register
2368h (Channel 1 Destination Select) to 1 (to select
the GE Command FIFO).
Port 2354 – Graphics AGP Chan 1/2 System Pitch ........ RW
........................................ always reads 0
31-27 Reserved
26-16 Ch 2 System Memory Line Offset (in quadwords)
........................................ always reads 0
15-11 Reserved
10-0 Ch 1 System Memory Line Offset (in quadwords)
Port 2358 – Graphics AGP Channel 2 System Start ...... RW
31-3 Channel 2 System Memory Start Address
(quadword aligned)
........................................ always reads 0
2-0 Reserved
Port 235C – Graphics AGP Channel 2 FB Start/Pitch . RW
31-22 Frame Buffer Line Offset (in quadwords)
........................................ always reads 0
21-19 Reserved
18-0 Frame Buffer Starting Address
Port 2360 – Graphics AGP Channel 2 FB Size ............... RW
........................................ always reads 0
31-27 Reserved
26-16 Ch 2 System Memory Line Offset (in quadwords)
........................................ always reads 0
15-11 Reserved
10-0 Ch 1 System Memory Line Offset (in quadwords)
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Port 236C – Graphics AGP Global & Chan 2 Control .. RW
........................................ always reads 0
31-26 Reserved
25-24 Sideband Address (SBA) Standby Latency Timer
23 High Priority Command Enable
0 Disable ...................................................default
1 Enable
22 Long Read Command Enable
0 Disable ...................................................default
1 Enable
21 System Side Channel 2 Priority
20 System Side Channel 1 Priority
19 System Side Channel 0 Priority
........................................ always reads 0
18 Reserved
17 Frame Buffer Channel 2 Priority
16 Frame Buffer Channel 1 Priority
........................................ always reads 0
15-5 Reserved
4-3 Channel 2 Read Operation Select
00 Disabled .................................................default
01 Read from Frame Buffer to AGP
10 Write from AGP to Capture / MPEG / FB
11 -reserved2
Channel 2 Interrupt Enable
0 Disable ...................................................default
1 Enable
1-0 Channel 2 Write Target Select
00 Write to Frame Buffer ............................default
01 Write to Capture / MPEG / FB
1x -reserved-
Port 2370 –AGP Status..................................................... RW
........................................always reads 0
31-18 Reserved
17 Channel 2 Interrupt Status
0 No interrupt pending.............................. default
1 Interrupt Pending
16 Channel 2 Busy Status
0 Idle .................................................... default
1 Busy
........................................always reads 0
15-10 Reserved
9
Channel 1 Interrupt Status
0 No interrupt pending.............................. default
1 Interrupt Pending
8
Channel 1 Busy Status
0 Idle .................................................... default
1 Busy
........................................always reads 0
7-2 Reserved
1
Channel 0 Interrupt Status
0 No interrupt pending.............................. default
1 Interrupt Pending
0
Channel 0 Busy Status
0 Idle .................................................... default
1 Busy
Graphics AGP Configuration Registers
Port 2380 – Graphics AGP Capability Identifier........... RW
31-0 xx
Port 2384 – Graphics AGP Status ................................... RW
31-0 xx
Port 2388 – Graphics AGP Command ............................ RW
31-0 xx
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Command List Operation
Port 23B0 –Command Buffer Start Address .................. RW
31-30 Command List Mode
00 Disable Command Buffer ...................... default
01 Enable Command Buffer
10 Flush Command Buffer Then Disable (after
first completing any commands in the existing
command buffer)
11 -reserved........................................always reads 0
29-24 Reserved
23-0 Command Buffer Start Address
Starting address of the command buffer in bytes
(quadword aligned). Writing to this register will set
the internal buffer start and end pointers to this
address.
The ProMedia implements an internal block called the
“Command List Control Unit” to process command lists.
Command list operation is invisible to software. After
initialization of the Command List Control Unit, software can
set registers as if there is no Command List Control Unit. If
an engine is idle and there are no pending commands in the
command buffer, data will be passed to the corresponding
register directly. Otherwise, address and data will be stored
into the command buffer to be processed later. When the
engine is idle, the Command List Control Unit will fetch
commands from the command buffer which is located in
video memory and send it to the engine. There are two
registers that determine the lower and upper bounds of the
command buffer, the Command Buffer Start and Command
Buffer End registers. The Command List Control Unit uses
the command buffer in a round robin fashion, i.e., the address
is wrapped around when it passes the end of the buffer.
Port 23B0 –Command Buffer End Address ................... RW
........................................always reads 0
31-24 Reserved
23-0 Command Buffer End Address
End address of the command buffer in bytes
(quadword aligned).
This address should be
programmed to one more than the address of the last
byte of the command buffer.
Registers in the Setup Engine, Rasterization Engine, Pixel
Engine, Memory Interface, and data from the host CPU and
the drawing environment can be buffered by the Command
List Control Unit. Command List Control registers and VGA
extension registers cannot be buffered. Every entry in the
command buffer is 64-bit with the lower 32 bits for the
register address and the higher 32 bits for register data. In
order to optimize memory bandwidth usage, the Command
List Control Unit maintains one read and one write FIFO in its
interface to memory in order to burst information from the
read/write command list.
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VGA Standard Registers - Introduction
The standard VGA register set consists of five sets of indexed
registers plus several individually addressed registers. All
VGA registers are addressed at specific I/O port addresses
defined by the VGA legacy standard.
where extended functions are provided in all indexed register
groups except the Attribute Controller (due to the unusual
nature of Attribute Controller indexing using a single I/O port
which makes access to this register group more cumbersome).
This document will detail the functions of all the standard
VGA registers first. All extended functions will then be
separately documented in following sections.
The non-indexed registers (also called the “Status / Enable”
registers) are:
Regarding notation used in this document, indexed registers
(including extended registers) may be referenced using a 2letter mnemonic from the following table followed by the
index number:
Input Status Register 0 Read at 3C2
Input Status Register 1 Read at 3BA or 3DA
Miscellaneous Register Read at 3CC, Write at 3C2
Video Subsystem Enable Read/Write at 3C3
Display Adapter Enable Read/Write at 46E8
Attribute Controller
Graphics Controller
CRT Controller
Sequencer
The indexed register sets each control different functional
blocks inside the hardware VGA logic. These register sets
are:
Attribute Controller
Sequencer
Graphics Controller
CRT Controller
RAMDAC
AR
GR
CR
SR
For example, index register 26h of the 3CE / 3CFh indexed
register group could also be referred to as GR26. Bit-7 if this
register, using this notation, would be GR26[7].
21 registers (0-14h) at 3C0/1
5 registers (0-4h) at 3C4/5
9 registers (0-8h) at 3CE/F
25 registers (0-18h) at 3x4/5
256 24-bit registers at 3C7-3C9
Register groups, for the most part, are included in this
document in order by I/O port address. Some registers are
included out of order with other registers in the same
functional block. Refer to the table of contents and the
register summary tables at the beginning of the register section
of this document for further information and help in finding
descriptive information for a specific register.
Indexed registers typically require two sequential port
addresses, the first of which is the index and the second of
which is the data. In other words, the index is written to the
first port address and then the data corresponding to that
indexed register is read from or written to the second port
address. The exceptions to this are the Attribute Controller
and the RAMDAC. For the Attribute Controller, the index is
written at 3C0 as expected. Data reads (but not writes) can be
performed from port 3C1 in the standard way. However,
generally most data read and all data write operations use the
same 3C0 port as used for the index. Data and address are
accessed on alternate operations to 3C0 with an internal flag
to keep track of where the next operation is to be performed
(reads from 3BA or 3DA reset the flag to point at the index
register). The other exception to the 2-port index/data
structure is the RAMDAC which uses three port addresses. In
this case, there are two locations provided for the index, 3C7
and 3C8, with the data at 3C9. There is actually only one
index register, but automatic pre / post incrementation is
performed differently depending on whether the index is
written at the “Read” address (3C7) or the “Write” address
(3C8). The current index value may be read at 3C8. Refer to
the RAMDAC register group for further explanation of the
operation of the index registes and sequential access to the
three data bytes of each indexed data location.
For standard VGA registers, primarily only the bit definitions
are provided here. Since the operation of these bits was
standardized long ago, full explanation of the operation of
these bits is not provided in this document. Detailed
explanation of these bits is provided by many fine indiustry
publications (check your local computer book store or the
internet for further information).
The number of registers listed above for each indexed register
group is the number of registers defined by the VGA standard.
The operation of these “base” registers will always be exactly
the same from one vendor’s implementation of the VGA to
another. Typically, however, there are additional nonstandard / extended functions implemented in higher
numbered index values. That is the case for this chip as well,
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Capture / ZV Port Registers
Port 2200 – Capture / ZV Port Command ...................... RW
........................................ always reads 0
31-28 Reserved
27-24 Address 1
........................................ always reads 0
23-20 Reserved
19-16 Address 0
15-8 Data 1
7-0 Data 0
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DVD Registers
Port 2280 – MC Version ID ...............................................RO
7-0 Version ID
Port 2282 – MC Frame Buffer Configuration................ RW
7
Interlaced Display
6
TV Flicker Filter Bypass
0 Use TV CRTC ....................................... default
1 Use VGA CRTC
5
Request Threshold of Display Command Queue
4
Request Threshold of PBF
3
Request Threshold of PFF
2
Hardware SP RL-Decode Disable
0 Enable .................................................... default
1 Disable
1-0 Frame Buffer Configuration
00 4-frame................................................... default
01 3.5-frame
10 3.5-frame HHR
11 3-frame
Port 2281 – MC Control ................................................... RW
7
Debug Mode
0 Disable ...................................................default
1 Enable
6
MC Completion Interrupt
0 Disable ...................................................default
1 Enable
5
VO Completion Interrupt
0 Disable ...................................................default
1 Enable
4
Host Bus Identification
0 AGP .....................................................default
1 PCI
3
Decode Overwrite
0 Enable.....................................................default
1 Disable
2-1 IDCT Data Format
00 -reserved-................................................default
01 9 bits
10 8 bits
11 16 bits
0
MC Mode
0 Disable ...................................................default
1 Enable
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Port 2287-2284 – MC Command Queue ......................... RW
31-12 Page Table Address
Port 2285-2284 – MC Status ............................................ RW
15 Task Pop Out Done Status
14-12 FIFO Status
11
SP Command Present
0 SP Command is Absent ..........................default
1 SP Command is Present
10-9 Video Output Display Fields
00 -reserved-................................................default
01 Top
10 Bottom
11 Both
8-6 Video Output Display Buffer
000 F0
.....................................................default
001 F1
010 F2
011 F3
100 H0
101 H1
110 H2
111 -reserved5-4 MC Buffer 2
Bit-1 = 1
Bit-1 = 0
00
H0
top
01
H1
bottom
10
H2
both
11 No Buf 2
n/a
3-2 MC Buffer 1
Bit-1 = 1
Bit-1 = 0
00
H0
F0
01
H1
F1
10
H2
F2
11
n/a
F3
1
MC Buffer is Field
0 Not Field ................................................default
1 Field
0
MC Command in Queue
0 Disable ...................................................default
1 Enable
This register changes definition when written with bit-0 = 1.
This address then becomes “MC Status” with the definition of
the bits matching the following bit definitions until MC-Status
bit-0 is cleared by hardware.
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MC Decode Done Status
10-9 Video Output Display Fields
00 -reserved- ............................................... default
01 Top
10 Bottom
11 Both
8-6 Video Output Display Buffer
000 F0
.................................................... default
001 F1
010 F2
011 F3
100 H0
101 H1
110 H2
111 -reserved5-4 MC Buffer 2
Bit-1 = 1
Bit-1 = 0
00
H0
top
01
H1
bottom
10
H2
both
11 No Buf 2
n/a
3-2 MC Buffer 1
Bit-1 = 1
Bit-1 = 0
00
H0
F0
01
H1
F1
10
H2
F2
11
n/a
F3
1
MC Buffer is Field
0 Not Field................................................ default
1 Field
0
MC Status
0 Not in progress....................................... default
1 In Progress
The bit definitions above are valid only when bit-0 is equal to
1. When hardware clears bit-0, bit definitions revert to those
defined by the “MC Command Queue” register defined in the
left hand column of this page.
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Port 228B-2288 – MC Y-Reference Address .................. RW
........................................ always reads 0
31-20 Reserved
19-0 Y-Reference Start Address (quadword aligned)
Port 22AB-22A8 – Color Palette Entries ........................ RW
Port 228F-228C – MC U-Reference Address .................. RW
........................................ always reads 0
31-20 Reserved
19-0 U-Reference Start Address (quadword aligned)
Port 22B3-22B0 – SP BUF0 Pixel Start Address ........... RW
Port 22B7-22B4 – SP BUF1 Pixel Start Address ........... RW
Port 2293-2290 – MC V-Reference Address ................... RW
........................................ always reads 0
31-20 Reserved
19-0 V-Reference Start Address (quadword aligned)
Port 22BB-22B8 – SP BUF0 Command Start Address . RW
Port 22BF-22BC – SP BUF1 Command Start Address . RW
Port 2297-2294 – MC Display Y-Address Offset ............ RW
........................................ always reads 0
31-20 Reserved
19-0 Y Address Offset
Y address offset (quadword aligned) of first display
pixel relative to the first pixel (top left hand corner)
of the picture.
Port 22C1-22C0 – SP Y Display Offset ........................... RW
Port 22D0 – Digital TV Encoder Control ....................... RW
Port 229B-2298 – MC Display U-Address Offset ........... RW
........................................ always reads 0
31-20 Reserved
19-0 U Address Offset
U address offset (quadword aligned) of first display
pixel relative to the first pixel (top left hand corner)
of the picture.
Port 22D3-22D1 – Digital TV Encoder CFC .................. RW
Port 229F-229C – MC Display V-Address Offset........... RW
........................................ always reads 0
31-20 Reserved
19-0 V Address Offset
V address offset (quadword aligned) of first display
pixel relative to the first pixel (top left hand corner)
of the picture.
Port 22A0 – MC H Macroblock Count ........................... RW
7-0 Number of Horizontal Macroblocks
Port 22A2 – MC V Macroblock Count............................ RW
7-0 Number of Vertical Macroblocks
Port 22A5-22A4 – MC Frame Buffer Y Length ............. RW
15-0 Number of Pixels in a Y Frame
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VGA Status / Enable Registers
VGA Registers
Port 3C2 – VGA Input Status 0 ........................................ RO
7
Vertical Retrace Interrupt Pending
........................................always reads 0
6-5 Reserved
4
Switch Sense
........................................always reads 0
3-0 Reserved
Attribute Controller Registers (AR)
For this indexed register group, the index is accessed at 3C0
as expected. However, although data operations can be
performed using port 3C1 in the standard way, data is
generally accessed at 3C0 as well. In other words, data and
address are accessed on alternate operations to 3C0 with an
internal flag to keep track of where the next operation is to be
performed. The state of the internal flag may be read back in
the extended registers (see CR24). To set the internal flag to
select the index (i.e., to set the flag so that the next access to
port 3C0h points to the index register), read port 3BAh or
3DAh (depending on the state of the color / mono bit in the
Miscellaneous Output Register at 3C2[0]).
Attribute
Controller register data may be read at 3C1 (the internal flag is
not toggled) but must be written at 3C0.
Port 3xA – VGA Input Status 1 ........................................ RO
This register is accessible at either 3BA or 3DA (shorthand
notation 3xA) depending on the setting of Miscellaneous
Output Register at 3C2[0].
........................................always reads 0
7-6 Reserved
5-4 Diagnostic
3
Vertical Retrace
........................................always reads 0
2-1 Reserved
0
Display Enable (Inverted)
Port 3C0 – VGA Attribute Controller Index .................. RW
........................................ always reads 0
7-6 Reserved
5
Palette Address Source
4-0 Attribute Controller Index
Only the lower 5 bits are implemented to allow access
to Attribute Controller registers 0-14h.
Port 3C2 – VGA Miscellaneous Output Register (Write)WO
Port 3CC – VGA Miscellaneous Output Register (Read)RO
7
Vertical Sync Polarity
6
Horizontal Sync Polarity
5
Page Bit for Odd / Even
........................................always reads 0
4
Reserved
3-2 Clock Select
1
Enable RAM
0
I/O Address Select
0 CRTC registers at 3Bx, Input Status 1 at 3BA
1 CRTC registers at 3Dx, Input Status 1 at 3DA
Port 3C0/3C1 Index 0-F – Attr Ctrlr Color Palette ....... RW
........................................ always reads 0
7-6 Reserved
5-0 Color Value
Port 3C0/3C1 Index 10 – Attr Ctrlr Mode Control ....... RW
7
P5 / P4 Select
6
Pixel Width
5
Pixel Panning Compatibility
........................................ always reads 0
4
Reserved
3
Select Background Intensity or Enable Blink
2
Enable Line Graphics Character Mode
1
Display Type
0
Graphics / Text Mode
Port 3C3 – VGA Video Subsystem Enable ..................... RW
........................................always reads 0
7-1 Reserved
0
Video Subsystem Enable
Port 46E8h – VGA Display Adapter Enable .................. RW
........................................always reads 0
7-4 Reserved
3
Display Adapter Enable
........................................always reads 0
2-0 Reserved
Port 3C0/3C1 Index 11 – Attr Ctrlr Overscan Color ..... RW
7-0 Overscan Color
Port 3C0/3C1 Index 12 – Attr Ctrlr Color Plane Ena ... RW
........................................ always reads 0
7-6 Reserved
5-4 Video Status Mux
3-0 Color Plane Enable for Color Planes 3-0
Port 3C0/3C1 Index 13 – Attr Ctrlr H Pixel Panning .... RW
........................................ always reads 0
7-4 Reserved
3-0 Horizontal Pixel Pan
Port 3C0/3C1 Index 14 – Attr Ctrlr Color Select ........... RW
........................................ always reads 0
7-4 Reserved
3-0 Color Select Bits 7-4
Revision 1.3 September 8, 1999
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VGA Sequencer Registers (SR)
VGA RAMDAC Registers
Port 3C4 – VGA Sequencer Index ................................... RW
7-0 Sequencer Index
Only the lower 3 bits are implemented in a standard
VGA to point to Sequencer registers 0-4. However,
all 8 bits are implemented here to allow for extended
registers up to index FF.
Port 3C6 – VGA RAMDAC Pixel Mask ......................... RW
7-0 Palette Address Mask
Port 3C6 – VGA RAMDAC Command .......................... RW
This register is a non-standard VGA register (“extension
register”) located at the same port address as the VGA
RAMDAC Pixel Mask register.
In order to maintain
compatibility with standard VGA operations, access to this
register is restricted: access is enabled by performing four
successive accesses to the Pixel Mask register at 3C6 (i.e.,
read 3C6 four times).
Port 3C5 Index 0 – Sequencer Reset ................................ RW
........................................ always reads 0
7-2 Reserved
1
Synchronous Reset
0
Asynchronous Reset
Port 3C5 Index 1 – Sequencer Clocking Mode ............... RW
........................................ always reads 0
7-6 Reserved
5
Screen Off
4
Shift 4
3
Dot Clock
2
Shift Load
........................................ always reads 0
1
Reserved
0
8/9 Dot Clocks
7-4
Port 3C5 Index 2 – Sequencer Map Mask ...................... RW
........................................ always reads 0
7-4 Reserved
3
Enable Map 3
2
Enable Map 2
1
Enable Map 1
0
Enable Map 0
3
2
1
0
Port 3C5 Index 3 – Sequencer Character Map Select.... RW
........................................ always reads 0
7-6 Reserved
5
Character Map Select A
4
Character Map Select B
3-2 Character Map Select A
1-0 Character Map Select B
Color Mode Select
0000 Pseudo-Color Mode............................... default
0001 Hi-Color Mode (15-bit direct interface)
0010 Muxed Pseudo-Color Mode (16-bit pixel bus)
0011 XGA Color Mode (16-bit direct interface)
01xx -reserved10xx -reserved1100 -reserved1101 True Color Mode (24-bit direct interface)
111x -reserved........................................always reads 0
Reserved
DAC Disable
0 DAC On (if SR20[0] = 1) ...................... default
1 DAC Off
........................................always reads 0
Reserved
RAMDAC Enable
0 Disable (Bypass) RAMDAC.................. default
1 Enable RAMDAC
Port 3C7 – VGA RAMDAC Read Index ........................ WO
Port 3C5 Index 4 – Sequencer Memory Mode ................ RW
........................................ always reads 0
7-4 Reserved
3
Chain 4
2
Odd / Even
1
Extended Memory
........................................ always reads 0
0
Reserved
Port 3C8 – VGA RAMDAC Write Index ....................... WO
Port 3C8 – VGA RAMDAC Index Readback ................. RO
7-0 RAMDAC Index
Port 3C9 Index 0-FF – RAMDAC Color Palette ........... RW
7-0 RAMDAC Color Data
There are 768 data entries in the palette consisting of 256
three-byte entries. R, G, and B 8-bit values are accessed on
successive operations to this port with the index
autoincremented after every 3 accesses. Refer to a VGA
programmers guide for further information.
Revision 1.3 September 8, 1999
-71
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VGA Graphics Controller Registers (GR)
Port 3CF Index 5 – Graphics Controller Mode ............. RW
........................................always reads 0
7
Reserved
6
256 Color Mode ........................................default = 0
5
Shift Register ............................................default = 0
4
Odd / Even ..............................................default = 0
3
Read Mode ..............................................default = 0
........................................always reads 0
2
Reserved
1-0 Write Mode ..............................................default = 0
Port 3CE – VGA Graphics Controller Index .................. RW
........................................ always reads 0
7
Reserved
6-0 Graphics Controller Index
Only the lower 4 bits are implemented in a standard
VGA to allow access to Graphics Controller registers
0-8. However, 7 bits are implemented here to allow
for extended registers up to index 7F.
Port 3CF Index 0 – Graphics Controller Set / Reset ...... RW
........................................ always reads 0
7-4 Reserved
3-0 Set / Reset Planes 3-0
Port 3CF Index 1 – Graphics Controller Set / Reset EnaRW
........................................ always reads 0
7-4 Reserved
3-0 Enable Set / Reset Planes 3-0
Port 3CF Index 2 – Graphics Controller Color CompareRW
........................................ always reads 0
7-4 Reserved
3-0 Color Compare Planes 3-0
Port 3CF Index 6 – Graphics Controller Miscellaneous RW
........................................always reads 0
7-4 Reserved
3-2 Memory Map
1
Chain Odd Maps to Even
0
Graphics Mode
Port 3CF Index 7 – Graphics Ctrlr Color Don’t Care .. RW
........................................always reads 0
7-4 Reserved
3-0 Color Don’t Care Planes 3-0
Port 3CF Index 8 – Graphics Controller Bit Mask........ RW
7-0 Bit Mask
Port 3CF Index 3 – Graphics Controller Data Rotate ... RW
........................................ always reads 0
7-4 Reserved
3
Function Select
2-0 Rotate Count
Port 3CF Index 4 – Graphics Ctrlr Read Map Select .... RW
........................................ always reads 0
7-2 Reserved
1-0 Map Select
Revision 1.3 September 8, 1999
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VGA CRT Controller Registers (CR)
CRTC registers are accessible at either 3B4 / 3B5 or 3D4 /
3D5 (shorthand notation 3x4 / 3x5) depending on the setting
of Miscellaneous Output Register 3C2 bit-0
Port 3x5 Index A – VGA CRTC – Cursor Start ............ RW
........................................always reads 0
7-6 Reserved
5
Cursor On/Off ..........................................default = 0
4-0 Cursor Row Scan Start ............................default = 0
Port 3x4 – VGA CRT Controller Index .......................... RW
7-0 CRT Controller Index
Only the lower 5 bits are implemented in a standard
VGA to allow access to CRTC registers 0-18h.
However, all 8 bits are implemented here to allow for
extended registers up to index FF.
Port 3x5 Index B – VGA CRTC – Cursor End .............. RW
........................................always reads 0
7
Reserved
6-5 Cursor Skew..............................................default = 0
4-0 Cursor Row Scan End..............................default = 0
Port 3x5 Index C / D – VGA CRTC Start Addr Hi/Lo.. RW
..............................................default = 0
Port 3x5 Index 0 – VGA CRTC – H Total ...................... RW
7-0 Horizontal Total....................................... default = 0
Port 3x5 Index E / F – VGA CRTC Cursor Loc Hi/Lo . RW
..............................................default = 0
Port 3x5 Index 1 – VGA CRTC – H Display Ena End ... RW
7-0 Horizontal Display Enable End .............. default = 0
Port 3x5 Index 10 – VGA CRTC – V Retrace Start ...... RW
7-0 Vertical Retrace Pulse Start ....................default = 0
Port 3x5 Index 2 – VGA CRTC – H Blank Start ............ RW
7-0 Horizontal Blanking Start ....................... default = 0
Port 3x5 Index 3 – VGA CRTC – H Blank End ............. RW
........................................ always reads 0
7
Reserved
6-5 Display Enable Skew................................ default = 0
4-0 Horizontal Blanking End......................... default = 0
Port 3x5 Index 11 – VGA CRTC – V Retrace End ........ RW
7
CR0-7 Write Protect ................................default = 0
........................................always reads 0
6
Reserved
5
Vertical Interrupt Enable ........................default = 0
4
Vertical Interrupt Clear ..........................default = 0
3-0 Vertical Retrace Pulse End......................default = 0
Port 3x5 Index 4 – VGA CRTC – H Retrace Start......... RW
7-0 Horizontal Retrace Pulse Start ......... default = 0FFh
Port 3x5 Index 12 – VGA CRTC – V Display Ena End RW
7-0 Vertical Display Enable End ...................default = 0
Port 3x5 Index 5 – VGA CRTC – H Retrace End .......... RW
7
Horizontal Blanking End......................... default = 0
6-5 Horizontal Retrace Delay ........................ default = 0
4-0 Horizontal Retrace Pulse End................. default = 0
Port 3x5 Index 13 – VGA CRTC – Offset....................... RW
7-0 Display Screen Logical Line Width ........ default = 0
Port 3x5 Index 14 – VGA CRTC – Underline Location RW
........................................always reads 0
7
Reserved
6
Double Word Mode..................................default = 0
5
Count By 4 .............................................default = 0
4-0 Underline Location...................................default = 0
Port 3x5 Index 6 – VGA CRTC – V Total....................... RW
7-0 Vertical Total ........................................... default = 0
Port 3x5 Index 7 – VGA CRTC – Overflow.................... RW
7
Vertical Retrace Start Bit-9 .................... default = 0
6
Vertical Display Enable End Bit-9.......... default = 0
5
Vertical Total Bit-9 .................................. default = 0
4
Line Compare Bit-8 ................................. default = 0
3
Vertical Blank Start Bit-8 ....................... default = 0
2
Vertical Retrace Start Bit-8 ................... default = 0
1
Vertical Display Enable End Bit-8.......... default = 0
0
Vertical Total Bit-8 .................................. default = 0
Port 3x5 Index 15 – VGA CRTC – V Blank Start ......... RW
7-0 Vertical Blanking Start ............................default = 0
Port 3x5 Index 16 – VGA CRTC – V Blank End ........... RW
7-0 Vertical Blanking End..............................default = 0
Port 3x5 Index 17 – VGA CRTC – Mode Control ......... RW
7
Hardware Rese .........................................default = 0
6
Word / Byte Mode ....................................default = 0
5
Address Wrap ...........................................default = 0
4
VSYNC Update Select (VGA Extended Capability)
0 Base may only be updated during Vsync ..... def
1 Base address may be updated during Hsync
3
Count By 2 ..............................................default = 0
2
Horizzontal Retrace Select ......................default = 0
1
Select Row Scan Counter.........................default = 0
0
Compatibility Mode Support...................default = 0
Port 3x5 Index 8 – VGA CRTC – Preset Row Scan ....... RW
........................................ always reads 0
7
Reserved
6-5 Byte Panning ............................................ default = 0
4-0 Preset Row Scan....................................... default = 0
Port 3x5 Index 9 – VGA CRTC – Max Scan Line .......... RW
7
200 to 400 Line Conversion..................... default = 0
6
Line Compare Bit-9 ................................. default = 0
5
Vertical Blank Start Bit-9 ....................... default = 0
4-0 Maximum Scan Line ................................ default = 0
Revision 1.3 September 8, 1999
Port 3x5 Index 18 – VGA CRTC – Line Compare ........ RW
7-0 Line Compare ...........................................default = 0
-73
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7HFKQRORJLHV ,QF
VGA Extended Registers
Port 3xB – Alternate Clock Select ................................... RW
3xB notation indicates that this register is accessible at either
3BB or 3DB depending on the setting of the color / mono bit.
7-5 New Mode Control Register Bits 3-1 ..........def = 00
These bits have the same function as SRD[3-1]
........................................always reads 0
4-2 Reserved
1-0 Video Clock Select ........................................def = 00
VGA Extended Registers – Non-Indexed I/O Ports
Port 3D8 – Alternate Destination Segment Addr ........... RW
........................................ always reads 0
7
Reserved
6-0 Alternative Destination Segment Address . def = 00
Read / write of this register is enabled by GRF[2].
This register becomes active when GR6[3-2] are not 00.
Port 3D9 – Alternate Source Segment Address .............. RW
........................................ always reads 0
7
Reserved
6-0 Alternative Source Segment Address ......... def = 00
Read / write of this register is enabled by GRF[2].
This register becomes active when GR6[3-2] are not 00.
Revision 1.3 September 8, 1999
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VGA Extended Registers – Sequencer Indexed
SR8 – Old / New Status ......................................................RO
7
Old / New Status (see SRB, SRC, SRD, SRE, GRE)
0 Old .....................................................default
1 New
6
Interlace Scan Field
0 Odd .....................................................default
1 Even
........................................ always reads 0
5
Reserved
4
Command FIFO Empty
0 Empty .....................................................default
1 Not Empty
........................................ always reads 0
3-0 Reserved
SRD – Mode Control 2 (Old) ........................................... RW
........................................always reads 0
7-6 Reserved
...................................... always reads 1
5
Reserved
........................................always reads 0
4
Reserved
3
CPU Bandwidth Select
0 Normal................................................... default
1 Non-interrupted CPU access during VBLANK
........................................always reads 0
2-0 Reserved
SRD – Mode Control 2 (New) .......................................... RW
7-4 Display FIFO Memory Request Threshold Ctrl
0000 Empty 0 level
0001 Empty 4 level......................................... default
0010 Empty 8 lrevel
0011 Empty 12 level
0100 Empty 16 level
0101 Empty 20 level
0110 Empty 24 level
0111 Empty 28 level
1000 Empty 32 level
1001 Empty 36 level
1010 Empty 40 level
1011 Empty 44 level
1100 Empty 48 level
1101 Empty 52 level
1110 Empty 56 level
1111 Empty 60 level
........................................always reads 0
3
Reserved
2-1 Video Clock Divide
00 Divide by 1 ............................................ default
01 Divide by 2
10 Divide by 4
11 Divide by 1.5
........................................always reads 0
0
Reserved
SR9 – Graphics Controller Version ..................................RO
7-0 Version Number ............................. always reads 58h
SRB – Version / Old-New Mode Control ........................ RW
7-0 Graphics Controller Version #...... always reads F3h
A write to this register will change the Old / New Mode
Control registers (SRD, SRE, and GRE) to the “old”
definition. A read from this register will change the Old / New
Mode Control registers to the “new” definition.
SRC – Configuration Port 1 ............................................. RW
Access to this register is enabled by SRE_Old[5] = 1 (“Select
Configuration Port 1”) and writes are enabled by SRE_New[7]
= 1 (“Configuration Port Write Enable”).
7
6
5
4
3
2-0
....................................... always reads 1
Reserved
Memory Bus Width
0 32-bit Memory Bus ................................default
1 64-bit Memory Bus
Note: Although the ProMedia integrated graphics
controller does not control memory directly (the
system memory controller is used to access graphics
memory as a portion of system memory), some
functional blocks in the graphics controller (such as
video) use this bit to manage their data bus widths.
....................................... always reads 1
Reserved
Video Subsystem Enable
0 46E8
1 3C3 .....................................................default
Video BIOS Size
0 64K .....................................................default
1 32K
.................................always reads 111b
Reserved
SRC – Configuration Port 2 ............................................. RW
Access to this register is enabled by SRE_Old[5] = 0 (“Select
Configuration Port 2”) and writes are enabled by SRE_New[7]
= 1 (“Configuration Port Write Enable”).
7-0
Reserved for BIOS
Revision 1.3 September 8, 1999
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SRE – Mode Control 1 (Old) ............................................ RW
.......................................always reads 1
7
Reserved
6
IRQ Polarity Select
0 Active High ............................................default
1 Active Low
5
Configuration Port (SR0C) Select
0 Select Port 2
1 Select Port 1 ..........................................default
........................................ always reads 0
4
Reserved
3
Memory Bus .........................................................RO
0 8-bit
1 16-bit .......................................always reads 1
2-1 256K Bank Select
00 Bank 0 ....................................................default
01 Bank 1
10 Bank 2
11 Bank 3
Note: an inverted value will be written to bit-1
These bits (and 3C2[5]) are write enabled when
GR06[3-2] = 00. 3C2[5] is used as a page select to
select one of the two 64KB pages.
0
RAMDAC Pixel Clock Invert
0 Normal ...................................................default
1 Invert pixel clock to RAMDAC
SRF – Power-up Mode 2 .................................................. RW
This register is write protected by SRE_New[7].
7
Reserved
...................................... always reads 1
6
BIOS Control
0 Disabled................................................. default
1 Enabled
5
Palette Mode
0 Master Abort Mode
1 Intel Retry Mode................................... default
4
Linear / Bank Addressing Control
0 Linear Only
1 Linear / Bank ........................................ default
3-0 Reserved for BIOS ............................ default = 1111
SR10 – VESA™ Big BIOS Control ................................. RW
7
Extended VESA™ Big BIOS Enable
0 Disabled ................................................ default
1 Enabled
6-5 Video Address Select ........................................... RO
00 A0000-A7FFF ....................................... default
01 -reserved10 B0000-B7FFF
11 B8000-BFFFF
These bits are decoded from GR6[3-2]
........................................always reads 0
4-1 Reserved
0
Page Select
0 Select the original C0000-C7FFF access ..... def
1 Select extended access defined by bits 6-5
Bit-0 of this register is write protected by SRE_New[7].
SRE – Mode Control 1 (New) ........................................... RW
7
Configuration Port Write Enable ........... default = 0
0 Write Protect
1 Write Enable
Ports effected: SRC, SRF, CR28-2A, SRE_New[6-4]
(this register), and SR10[0]
6
CPU Bandwidth Select for Text Mode
0 132-Column Text
1 Other Text .............................................default
5-0 64K Bank Select ....................................... default = 0
Bit-1 should be inverted when performing writes
These bits are enabled when GR06[3-2] are written
with any value other than 00.
SR11 – Protection ........................................................ RW
7-0 Register Protection Enable ....................default = 00
87 Unprotect all extended registers except those
which may still be protected by SRE_New[7]
92 Unprotect all extended registers independent
of SRE_New[7]
If any value other than the ones listed above is
programmed into this register, all extended registers
will be write protected.
SR12 – Threshold
........................................................ RW
7-4 Queue Threshold Playback and Capture .....def = 2
Threshold of the display queue when both playback
and capture are enabled (for definition see SRD.new).
3-0 Queue Threshold Playback or Capture........def = 1
Threshold of the display queue when either playback
or capture are enabled (for definition see SRD.new)
The old threshold is used when neither playback nor capture is
enabled. All three thresholds cannot be set to 0. Other
definitions are the same as the original.
Revision 1.3 September 8, 1999
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Graphics Clock Synthesizer Control
SR20 – Clock Synthesizer / RAMDAC Setup................. RW
........................................always reads 0
7
Reserved
6
Multiplex Mode Sync Mechanism
0 Normal Mode......................................... default
1 Enable synchronization in multiplexed mode
for high VCLK tracking
5
Simultaneous VAFC and Playback
0 Simultaneous VAFC / playback display default
1 Playback only
4
VAFC and Playback Display Overlay
0 VAFC is on top...................................... default
1 Playback is on top
3
DAC Test Mode
0 Disable................................................... default
1 Enable
2
Video Mode
0 Disable................................................... default
1 Enable
1-0 Video Mode Select
x0 5-5-5 Hi-color ..................................default = 0
x1 5-6-5 XGA-color
0x Video Playback, True-color
1x Video Playback, 256-color
SR18 – VCLK1 Frequency Control 0 .............................. RW
7-0 VCLK1 Frequency Generator Numerator .... def=0
SR19 – VCLK1 Frequency Control 1 .............................. RW
7-6 VCLK1 Frequency Generator K-Factor ....... def=0
5-0 VCLK1 Frequency Generator Denominator. def=0
SR1A – VCLK2 Frequency Control 0 ............................. RW
7-0 VCLK2 Frequency Generator Numerator .... def=0
SR1B – VCLK2 Frequency Control 1 ............................. RW
7-6 VCLK2 Frequency Generator K-Factor ....... def=0
5-0 VCLK2 Frequency Generator Denominator. def=0
Table 8. Graphics Clock Frequencies – 14.31818 MHz Reference
Denominator
Value
Numerator
Value
N
M
K
Actual
Frequency
Expected
Frequency
Frequency
Error %
88
89
88
83
85
84
84
84
43
46
42
43
43
4A
48
46
44
44
42
44
44
44
44
44
04
07
02
03
05
05
3E
4F
5D
30
4A
42
43
48
1B
33
18
21
23
63
53
43
33
34
22
39
3B
42
44
4A
22
3C
19
22
3A
4B
62
79
93
48
74
66
67
72
27
51
24
33
35
99
83
67
51
52
34
57
59
66
68
74
34
60
25
34
58
75
8
9
8
3
5
4
4
4
3
6
2
3
3
10
8
6
4
4
2
4
4
4
4
4
4
7
2
3
5
5
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
25.057
28.311
36.153
40.091
41.932
44.148
44.744
47.727
50.114
52.798
57.273
58.705
61.568
63.835
65.148
67.116
70.398
71.591
75.170
77.557
79.943
88.295
90.682
97.841
100.227
108.182
118.125
120.273
135.000
169.773
25.175
28.322
36.000
40.000
42.000
44.000
44.900
48.000
50.350
52.800
57.270
58.800
61.600
64.000
65.000
67.200
70.400
72.000
75.000
77.000
80.000
88.000
90.000
98.000
100.000
108.000
118.000
120.000
135.000
170.000
-0.0047
-0.0004
0.0043
0.0023
-0.0016
0.0034
-0.0035
-0.0057
-0.0047
0.0000
0.0000
-0.0016
-0.0005
-0.0026
0.0023
-0.0012
0.0000
-0.0057
0.0023
0.0072
-0.0007
0.0034
0.0076
-0.0016
0.0023
0.0017
0.0011
0.0023
0.0000
-0.0013
05
5A
90
5
0
200.455
200.000
0.0023
The clock frequency can be derived by multiplying the reference frequency times (N+8) / [(M+2) x 2K]
Revision 1.3 September 8, 1999
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:H &&RRQQHFW
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Graphics Signature Analyzer Registers
Graphics Connector Control Registers
SR21 – Signature Control ................................................. RW
7
Signature Generator Enable
0 Disable (readback 0 indicates done).......default
1 Enable (readback 1 indicates busy)
6
Signature Source Select
0 TV / CRT ...............................................default
1 LCD
5-0 Bit Select .............................................. default = 0
SR25 – Monitor Sense ....................................................... RO
........................................ always reads 0
7-3 Reserved
2-0 Monitor Sense Result: [red, green, blue]
SR37 – Video Key Mode .................................................. RW
7
Feature Connector Input Clock Polarity
0 Normal................................................... default
1 Inverted
6
Signal Output (AFC Processing)
0 Signal output is sent before AFC processingdef
1 Signal output is sent after AFC processing
5-4 Feature Connector Input Pixel Clock Tuning
00 0 ns .................................................... default
01 4 ns
10 8 ns
11 12 ns delay of pixel clock with respect to data
3-0 Overlay Key Type
0000 VGA Port Only...................................... default
0001 Color Key & Video Key
0010 Color Key & not Video Key
0011 Color Key
0100 Not Color Key & Video Key
0101 Video Key
0110 Color Key XOR Video Key
0111 Color Key | Video Key
1000 Not Color Key & Not Video Key
1001 Color Key XNOR Video Key
1010 Not Video Key
1011 Color Key | Not Video Key
1100 Not Color Key
1101 Not Color Key | Video Key
1110 Not Color Key | Not Video Key
1111 Video Port Only
SR23-22 – Signature Data .................................................RO
15-0 Signature Data
Graphics Power Management Control Registers
SR24 – Power Management Control ............................... RW
7
RAMDAC Clock During RAMDAC Powerdown
0 14.318 MHz ..........................................default
1 14.31818 MHz divided by 2
6
Enable VCLK2 VCO Directly
(without warmup sequence)
0 Enable
1 Don’t Enable ..........................................default
5-4 Clock Input Divisor
Divisor for 14.318 MHz clock input to MCLK to
drive DRAM refresh cycles in power managed
modes.
00 1
.....................................................default
01 2
10 4
11 8
3
Power Management Slow MCLK
0 Use divided MCLK during standby & suspend
1 Use MCLK during standby & suspend........ def
2
Enable MCLK VCO Directly
(without warmup sequence)
0 Enable
1 Don’t Enable .........................................default
1
Enable MCLK VCO Directly
(without warmup sequence)
0 Enable
1 Don’t Enable .........................................default
0
DAC Power
0 Off .....................................................default
1 On
Revision 1.3 September 8, 1999
SR38 – Advanced Feature Connector (AFC) Control ... RW
........................................ always reads 0
7
Reserved
6
DCLK Rate (set after other bits for syncronization)
0 PCLK .................................................... default
1 PCLK / 2
5
DCLK Phase Select (if bit-6 = 1)
0 180 degree phase shift ........................... default
1 In phase
4
DCLK Output Polarity
0 Normal when bit-6 = 0........................... default
1 Inverted
3
VCLK Input Polarity
0 Normal................................................... default
1 Inverted
........................................ always reads 0
2-1 Reserved
0
Pixel Data Bus Output Enable Control
0 Disable Output Drive............................. default
1 Disable drive only when EVIDEO# is low
-78
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Graphics Playback Control Registers
Graphics Second Playback Control Registers
SR52-50 – Playback Color Key Data ............................... RW
23-16 Playback Color Key for True Color Mode
15-8 Playback Color Key for High Color Mode
7-0 Playback Color Key for 256 Color Mode
SR62-60 – 2nd Playback Color Key Data ........................ RW
23-16 Playback Color Key for True Color Mode
15-8 Playback Color Key for High Color Mode
7-0 Playback Color Key for 256 Color Mode
SR56-54 – Playback Color Key Mask ............................. RW
23-16 Playback Color Key Mask for True Color Mode
15-8 Playback Color Key Mask for High Color Mode
7-0 Playback Color Key Mask for 256 Color Mode
SR66-64 – 2nd Playback Color Key Mask ....................... RW
23-16 Playback Color Key Mask for True Color Mode
15-8 Playback Color Key Mask for High Color Mode
7-0 Playback Color Key Mask for 256 Color Mode
SR57 – Playback Video Key Mode Function .................. RW
7-0 Overlay Key Type
Defines all 256 defferent types of mixing among
VGA Color Key, Playback Window Key, and Video
Chroma Key (very similar to ROP3 code). Below
are some common combinations:
00 VGA Port Only
F0 Color Key Only
CC Playback Key Only
AA Chromakey Only
88 Playback Key & Chromakey
C0 Colorkey & Playback Key
80 Colorkey & Playback key & Chromakey
FF Video Port Only
Graphics BIOS Scratch Pad Registers
SR5A – Scratch Pad 0 ....................................................... RW
SR5B – Scratch Pad 1 ....................................................... RW
SR5C – Scratch Pad 2 ....................................................... RW
SR5D – Scratch Pad 3 ....................................................... RW
SR5E – Scratch Pad 4 ....................................................... RW
SR5F – Scratch Pad 5 ....................................................... RW
Revision 1.3 September 8, 1999
-79
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Graphics Video Display Registers
SR82-80 – Window 1 U-Plane FB Start Address............ RW
........................................ always reads 0
23-20 Reserved
19-0 W1 U-Plane FB Start Address
When operating in planar mode, this field defines the
frame buffer starting address for the U-plane for the
first live video window
SR8C-8B – Window 2 Vertical Scaling Factor .............. RW
15 W2 Vertical Minify / Zoom Select
0 Zoom .................................................... default
1 Minify
14 W2 Vertical Filtering
0 Off .................................................... default
1 On
SR85-83 – Window 1 V-Plane FB Start Address............ RW
........................................ always reads 0
23-20 Reserved
19-0 W1 V-Plane FB Start Address
When operating in planar mode, this field defines the
frame buffer starting address for the V-plane for the
first live video window
Zoom Selected (Bit-15 = 0)
13-0 W2 Vertical Zoom Factor
Same format as for the first live video window as
defined in CR82 and CR83
Minify Selected (Bit-15 = 1)
13-10 Reserved
9-0 W2 Vertical Minify Factor
SR88-86 – Window 2 Frame Buffer Start Address ........ RW
........................................ always reads 0
23-20 Reserved
19-0 Window 2 Frame Buffer Start Address
Frame buffer starting address for the second live
video window (packed YUV format only)
SR90-8D – Window 2 Live Video Start .......................... RW
........................................ always reads 0
31-28 Reserved
27-16 W2 Vertical Starting Point
........................................ always reads 0
15-12 Reserved
11-0 W2 Horizontal Starting Point
SR8A-89 – Window 2 Horizontal Scaling Factor ........... RW
15 W2 Horizontal Minify / Zoom Select
0 Zoom .....................................................default
1 Minify
SR94-91 – Window 2 Live Video End ............................. RW
31-30 W2 Line Buffer Level Bits 8-7 (see SR95)
........................................ always reads 0
29-28 Reserved
27-16 W2 Vertical Ending Point
........................................ always reads 0
15-12 Reserved
11-0 W2 Horizontal Ending Point
Zoom Selected (Bit-15 = 0)
14 Reserved
13-0 W2 Horizontal Zoom Factor
Same format as for the first live video window as
defined in CR80 and CR81
SR95 – Window 2 Live Video Line Buffer Level ........... RW
........................................ always reads 0
7
Reserved
6-0 W2 Line Buffer Level Bits 6-0 (see SR91[31-30])
Minify Selected (Bit-15 = 1)
14-13 W2 Tap
12-10 W2 Horizontal Minify Integer (Inverter)
9-0 W2 Horizontal Minify Factor
Revision 1.3 September 8, 1999
-80
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
SR96 – New Live Video Window Control 0 .................... RW
7
W2 Horizontal Interpolation
0 Interpolation ...........................................default
1 Duplication
6
W1 Vertical Interpolation U and V Components
0 Enable.....................................................default
1 Disable
This bit is effective only if window 1 vertical Y
interpolation is enabled (CR8E[12] = 1)
........................................ always reads 0
5
Reserved
4
656
0 Disable ...................................................default
1 Enable
3
W2 Color Space Converter (CSC) Bypass
0 Disable ...................................................default
1 Enable
........................................ always reads 0
2
Reserved
1
MC Even / Odd Inverter
0 Disable ...................................................default
1 Enable
0
MC Interlace Display
0 Disable ...................................................default
1 Enable
SR98 – New Live Video Window Control 2 ................... RW
7-6 Two Live Window Chroma Key Select
00 Chroma key only.................................... default
01 Window 1 & chroma key
10 Window 2 & chroma key
11 (Window 1 | Window 2) & chroma key
5-4 W1 Anti-Flicker Removal
00 Disable................................................... default
01 One field is shifted up 1 line
10 One field is shifted up 2 lines
11 One field is shifted up 3 lines
3
W1 Anti-Flicker Removal Field Selection
0 Odd field is shifted up ........................... default
1 Even field is shifted up
2-1 W2 Anti-Flicker Removal
00 Disable................................................... default
01 One field is shifted up 1 line
10 One field is shifted up 2 lines
11 One field is shifted up 3 lines
0
W2 Anti-Flicker Removal Field Selection
0 Odd field is shifted up ........................... default
1 Even field is shifted up
SR99 – New Live Video Window Control 3 ................... RW
........................................ always reads 0
7
Reserved
6
Capture Addres Swap Enable
0 Disable................................................... default
1 Enable
5
Capture Address Swap
0 No swap ................................................. default
1 Swap
4-2 W2 HDE Delay Adjust............................. default = 0
........................................ always reads 0
1-0 Reserved
SR97 – New Live Video Window Control 1 .................... RW
........................................ always reads 0
7
Reserved
6
Planar Mode X (Horizontal) Y/UV Ratio
0 2x
.....................................................default
1 4x
5-4 Planar Mode Y (Vertical) Y/UV Ratio
00 2x (Yp420) .............................................default
01 4x (Yp410)
1x 1x (Yp422)
........................................ always reads 0
3
Reserved
2-0 Window Mode .................................... default = 000b
Format
Interpolation Line Buffers
000 YUV422
H-V
(96+48) x 64
001 Planar
H-V
(96+48) x 64
01x YUV
FIFO H
96 x 64
100 MPEG2 YUV422 H-V
2x(96+48)x64
101 MPEG2 Planar
H-V
2x(96+48)x64
11x YUV422
H-V (V-YUV) 2x(96+48)x64
For 1xx, only one h/w overlay window is supported
SR9B-9A – Window 1 UV Video Row Byte Offset ........ RW
........................................ always reads 0
15-14 Reserved
13-0 W1 UV Plane Video Row Byte Offset (the bytes in
a row)
SR9D-9C – Window 2 Y Video Row Byte Offset ........... RW
........................................ always reads 0
15-14 Reserved
13-0 W2 Y Plane Video Row Byte Offset (the bytes in a
row)
SR9E – Line Buffer Request Threshold.......................... RW
........................................ always reads 0
7
Reserved
6-0 Line Buffer Request Threshold Level...........def = 0
Revision 1.3 September 8, 1999
-81
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
SR9F – VBI Control ......................................................... RW
7
VBI Interrupt Status............................................RO
........................................ always reads 0
6
Reserved
5
VBI Bit-8
4
VBI IV Bit-8
3
VBI Interrupt
0 Disable ...................................................default
1 Enable
2
VBI Enable
0 Disable ...................................................default
1 Enable
1-0 VBI Data Format in Frame Buffer
00 Every field data overwrite ......................default
01 Data in even/odd format
10 Every two field data write contiguous
11 -reserved-
SRAD-AC – VBI Vertical Interrupt Position................. RW
........................................ always reads 0
15 Reserved
14-12 Dithering Mode
000 Bypass dithering .................................... default
001 -reserved010 24 bpp dither to 16 bpp
011 24 bpp chop to 16 bpp
100 24 bpp dither to 15 bpp
101 24 bpp chop to 15 bpp
110 24 bpp dither to RGB8
111 24 bpp chop to RGB8
11 Capture CSC
0 Disable................................................... default
1 Enable
10-0 VINST[10-0]
SRA3-A0 - VBI Frame Buffer Address ........................... RW
31-20 VBI Row Byte Offset
19-0 VBI Start Address
SRA7-A4 – VBI Capture Start ......................................... RW
........................................ always reads 0
31-27 Reserved
26-16 VBI Vertical Start
........................................ always reads 0
15-11 Reserved
10-0 VBI Horizontal Start
SRAB-A8 – VBI Capture End.......................................... RW
........................................ always reads 0
31-27 Reserved
26-16 VBI Vertical End
........................................ always reads 0
15-11 Reserved
10-0 VBI Horizontal End
Revision 1.3 September 8, 1999
-82
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VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
SRAF-AE – Capture Row Byte Offset ............................ RW
........................................ always reads 0
15 Reserved
14 Capture Address Initial Control
13-0 Capture Row Byte
SRBD – Dual View Mux Control .................................... RW
........................................ always reads 0
7-3 Reserved
2-0 CRT / TV View Multiplexing Control
00x Color key 1 determines top window (1=W1)def
010 Video window 1 overlay
011 Video window 2 overlay
10x Window key defines window 1 on top
11x Window key defines window 2 on top
SRB1-B0 – Window 1 HSB Control ................................ RW
15-10 Brightness
9-5 Sin(Hue) * Saturation * 8 (bit-9 is the sign bit)
4-0 Cos(Hue) * Saturation * 8 (bit-4 is the sign bit)
Hue range is 0-360 degrees (default = 0)
Saturation range is 0-1.875 (default = 1)
SRBE – Miscellaneous Control Bits ................................ RW
7
Planar Capture
0 Off .................................................... default
1 On
6-5 Capture Start Address W/R Control (CR98[190])
0x W/R Y address....................................... default
10 W/R U address
11 W/R V address
4
Video Engine Power Saving Mode
0 On
.................................................... default
1 On
........................................ always reads 0
3
Reserved
2
Interpolation Bypass
0 Interpolation .......................................... default
1 Bypass
1
Window 2 HSCB Enable
0 Bypass ................................................... default
1 Enable
0
Window 1 HSCB Enable
0 Bypass ................................................... default
1 Enable
SRB3-B2 – Window 2 HSB Control ................................ RW
15-10 Brightness
9-5 Sin(Hue) * Saturation * 8 (bit-9 is the sign bit)
4-0 Cos(Hue) * Saturation * 8 (bit-4 is the sign bit)
Hue range is 0-360 degrees (default = 0)
Saturation range is 0-1.875 (default = 1)
SRB6-B4 – Second Display Address Select ..................... RW
........................................ always reads 0
23-20 Reserved
19-0 Second Display Address for Double Buffering
Second display address for double buffering instead
of capture address
SRB7 – Video Sharpness................................................... RW
7-0 Video Sharpness Factor
SRBA-B8 – Second Capture Address Select ................... RW
........................................ always reads 0
23-20 Reserved
19-0 Second Capture Address for Double Buffering
Second capture address for double buffering instead
of display address
SRCE – Window 2 Live Video Control .......................... RW
........................................ always reads 0
7
Reserved
6
W2 Vertical Interpolation
0 Disable................................................... default
1 Enable
5
Planar Mode X (Horizontal) Y/UV Ratio
0 2x
.................................................... default
1 4x
4-3 Planar Mode Y (Vertical) Y/UV Ratio
00 2x (Yp420) ............................................ default
01 4x (Yp410)
1x 1x (Yp422)
2-0 Window Mode .................................... default = 000b
Format
Interpolation Line Buffers
000 YUV422
H-V
(96+48) x 64
001 Planar
H-V
(96+48) x 64
01x YUV
FIFO H
96 x 64
100 MPEG2 YUV422 H-V
2x(96+48)x64
101 MPEG2 Planar
H-V
2x(96+48)x64
11x YUV422
H-V (V-YUV) 2x(96+48)x64
For 1xx, only one h/w overlay window is supported
SRBC – Contrast Control ................................................. RW
7-4 Window 2 Contrast
3-0 Window 1 Contrast
Revision 1.3 September 8, 1999
-83
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
SRD1-D0 – Window 2 UV Row Byte Offset ................... RW
........................................ always reads 0
15-14 Reserved
13-0 W2 UV Plane Video Row Byte Offset (the bytes in
a row)
SRDB-DA – Window 2 V-Count Status........................... RO
15-0 W2 V Count Status
SRDD-DC – Dual View Control ...................................... RW
........................................ always reads 0
15-11 Reserved
10-9 Dual View Control - SHIF
8
Dual View Control – G Window Enable
7
Dual View Control – W2 Double Buffer Enable
6
Dual View Control – W1 Double Buffer Enable
5
Dual View Control – W2 Address Trans Enable
4
Dual View Control – W1 Address Trans Enable
3
Dual View Control – Digital TV Enable
2
Dual View Control – Digital Video LUT Write
1
Dual View Control – Digital Video LUT Read
0
Dual View Control – Digital Video CRT
SRD4-D2 – Window 2 U-Frame Start Address .............. RW
........................................ always reads 0
23-20 Reserved
19-0 W2 U-Frame Start Address
SRD7-D5 – Window 2 V-Frame Start Address .............. RW
........................................ always reads 0
23-20 Reserved
19-0 W2 V-Frame Start Address
SRD9-D8 – Digital TV Interface Control ........................ RW
(see also CRD0, VGA / Digital TV Sync Control)
SRDF-DE – Window 1 V-Count Status ........................... RO
........................................ always reads 0
15-13 Reserved
12 DVV Sync
11-0 W1 V Count Status
........................................ always reads 0
15-14 Reserved
13 DIVS I/O Control
12 DTVI Signal Output Control, except DIVS
(Vsync)
11 Dual View Clock Inversion Control
10 Dual View Clock Control for DTVI
9
DICLK Inversion Control
8
DIVS Inversion Control
7
DIHS Inversion Control
6-5 YUV Order Inversion Control
4, 1 Data Out Control
00 VGA / Video Overlay Data
x1 TV Data
10 Data Direct from Video Engine
3-0 HS / VS / CLK Control
0000 VGAHS, VGAVS, and PCLK
x100 VGAHS, VGAVS, and SPKTV
1000 VGAHS, VGAVS, and PCLK x 2
xxx1 DVHS, DVVS, and LCDCLK
xx10 TVHS, TVVS, and TVCLK
Revision 1.3 September 8, 1999
-84
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
VGA Extended Registers – Graphics Controller Indexed
GRE – Old Source Segment Address ............................... RW
........................................ always reads 0
7-3 Reserved
2-1 Source Segment Address Select .............. default = 0
........................................ always reads 0
0
Reserved
GRF – Miscellaneous Extended Function Control ........ RW
........................................ always reads 0
7
Reserved
6
Character Clock Division Control Bit-1 (see bit-3)
00 No division ............................................ default
01 Divide by 2
10 Divide by 3
11 -reserved5
Symmetric / Asymmetric DRAM Address
0 Symmetric.............................................. default
1 Asymmetric
4
Compressed Chain 4 Mode for CPU Path
0 Disable................................................... default
1 Enable
3
Character Clock Division Control Bit-0 (see bit-6)
2
Alternate Bank & Clock Select
0 Disable 3D8, 3D9, and 3xB................... default
1 Enable 3D8, 3D9, and 3xB
1
Compressed Chain 4 Mode Display Path
0 Disable................................................... default
1 Enable
0
Source Segment Address Register Enable
0 Disable GRE.......................................... default
1 Enable GRE
All bits except 2 and 0 are write protected by SRE_New[7]
GRE – New Source Segment Address.............................. RW
........................................ always reads 0
7
Reserved
6-0 Source Segment Address Select .............. default = 0
Bit-1 is written inverted
Revision 1.3 September 8, 1999
-85
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Power Management Registers
GR20 – Standby Timer Control ....................................... RW
7
Timer Initialize & Enable
0 Enable Timer..........................................default
1 Initialize and hold standby and DPMS timer
6-4 Timer Testing .......................................................RO
........................................ always reads 0
3-0 Reserved
GR22 – Power Management Control 2........................... RW
7
Timer Test Mode
0 Disable................................................... default
1 Enable
6
Refresh Clock Select
0 Crystal input or external clock (XMCLK)
provides refresh clock during suspend... default
1 REFCLK is used as refresh clock during
suspend for 64ms refresh (ignore “Suspend
DRAM Refresh Mode” bits 5-4 below)
5-4 Suspend DRAM Refresh Mode
00 No refresh .............................................. default
01 Self refresh
10 Crystal clock provides rate for 8ms refresh
11 Crystal clock provides rate for 64ms refresh
3
Disable GPIO
0 Allow GPIO 7-0 pins to drive data in .... default
1 Disable GPIO 7-0 pins (and their shared
functions) from driving data. Tristates input
buffers on pins so no power is consumed if
GPIO pins are set to input mode.
........................................ always reads 0
2
Reserved
1
Hardware / Software Oscillator Select
0 Software controls oscillator off with bit-0
(prevents automatic oscillator shutdown
without direct software control of the
“Oscillator Disable” bit) .............................. def
1 Hardware controls oscillator off (allow
oscillator shutdown when power states are
entered using hardware mechanisms)
0
Oscillator Disable
0 Enable normal function.......................... default
1 Disable (oscillator off)
GR21 – Power Management Control 1 ........................... RW
7
Power Management Pin Polarity
0 Active High ............................................default
1 Active Low
6
PCI Power Management
0 Disable ...................................................default
1 Enable
5
Suspend Mode
0 Normal mode..........................................default
1 Enter Suspend Mode
4
Suspend Input Pin
0 Disable ...................................................default
1 Enable
3
D3 to D0 Reset
0 Disable ...................................................default
1 Enable
2
Standby Input Pin
0 Disable ...................................................default
1 Enable
1
CLKRUN# Mechanism
0 Disable ...................................................default
1 Enable
0
Consistent Standby / Suspend
0 The bits in the PCI PM configuration registers
will be OR’ed with bits 5 and 3 of this register
for connection to the internal PM state
machine ..................................................default
1 The bits in the PCI PM configuration registers
will be the same as bits 5 and 3 of this register
to allow software coherency
Revision 1.3 September 8, 1999
-86
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GR23 – Power Status ........................................................ RW
7
Power Management Pin Polarity (see GR21[7])
6-5 Chip Power Status
00 Ready
01 Standby
10 Suspend
11 -reserved4
LCD Power Sequence Status
0 LCD power sequencing is not occurring at this
time
1 LCD power sequencing is occurring at this
time
3-2 Panel Power Sequencing
00 Fast panel power sequencing..................default
01 -reserved10 -reserved11 Slow panel power sequencing
1-0 DPMS Power Status
00 On Mode (CRT interface is active and
RAMDAC is full on) ..............................default
01 Standby Mode (Hsync disabled, Vsync active,
DAC off, RAMDAC color palette lookup
table (LUT) video data path is off but LUT
I/O is allowed)
10 Suspend Mode (Vsync disabled, Hsync active,
RAMDAC is off but contents are retained)
11 Off Mode (Hsync and Vsync disabled, DAC
LUT is full off)
In hardware mode, these bits indicate the status of
CRT Hsync and Vsync as well as the internal
RAMDAC power state (the “off” mode state can be
read only in CRT only mode). In software mode,
these bits control the state of the CRT Hsync and
Vsync signals but not the power state of the internal
RAMDAC. In simultaneous display modes, the
power state of the RAMDAC is not controlled by the
DPMS Power State (bits 1-0), but by the Chip Power
State (bits 6-5).
GR24 – Software Power Control..................................... RW
7
VCLK
0 Disable
1 Enable................................................... default
6
MCLK
0 Disable
1 Enable................................................... default
5
CPU & DRAM Data Bus
0 Disable
1 Enable................................................... default
........................................ always reads 0
4
Reserved
3
ENPBLT (Panel and/or Backlight Enable)
Control
Software Power Control
0 Drive ENPBLT Low.............................. default
1 Drive ENPBLT High
Hardware Power Control (timers, pin, register bit)
0 ENPBLT is active low........................... default
1 ENPBLT is active high
2
Panel VDD
0 Disable................................................... default
1 Enable
1
Panel Interface Signals
0 Disable................................................... default
1 Enable
0
Panel VEE
0 Disable................................................... default
1 Enable
GR25 – Power Control Select .......................................... RW
When any of bits 7-6 or 3-0 are set to 1, the corresponding
power control bit reads back the logic state of the internal
power management engine. For all bits below, 0 selects
hardware power control and 1 selects software power control.
7
6
5
4
3
2
1
0
Revision 1.3 September 8, 1999
-87
Power Control for VCLK ..............................def = 1
Power Control for MCLK ............................def = 1
Power Control for the Data Bus ...................def = 1
Power Control for the RAMDAC ................def = 1
The RAMDAC is software enabled in GR26[7-6]
Power Control for Panel Enable / Backlight def = 1
(see GR24[3])
Power Control for Panel VDD .....................def = 1
Power Control for Panel Interface Signals .def = 1
Power Control for Panel VEE ......................def = 1
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GR26 – DPMS Control ..................................................... RW
7-6 RAMDAC Internal Power Control
00 Normal ...................................................default
01 DAC off (used in LCD only mode)
10 Standby (DAC off, LUT in low power mode,
I/O allowed to LUT). May be used in LUT
bypass mode.
11 Suspend (DAC off, LUT access disallowed
but LUT contents are preserved)
........................................ always reads 0
5-4 Reserved
3
DPMS Control
0 Software Control Mode: DPMS controlled by
GR23[1-0] in simultaneous display and CRTonly modes (may be used to decouple the
power modes of the CRT and LCD during
simultaneous display) ..........................default
1 Hardware Control Mode: DPMS controlled
by internal power states.
........................................ always reads 0
2-0 Reserved
DPMS Control Modes
DPMS Software Control Mode
In simultaneous display mode, the software control mode can
be used to control DPMS low power states independent of the
chip power states. In CRT display mode, software mode
gives total DPMS control to software. Pseudo-standby may
be controlled by bits 7 and 6, as well as BLANK# timing.
DPMS Hardware Control Mode
Table 9. DPMS Sequence - Hardware Timer Mode
Power Level
DPMS Mode
High - Activity detected
On
Moderate - 16 min inactivity
Standby
Low - 32 min inactivity
Suspend
Lowest - 64 min inactivity
Off
DPMS hardware timer mode is defined as CRT only mode
with the DPMS control mode bit set to hardware (bit 3 =1).
Activity detection is set by register GR21[2:0]. Status is
indicated in bits 1 and 0. The timer may be controlled by
software from GR20[7].
Table 10. DPMS Sequence - Hardware Mode in
Simultaneous Display Mode
Power Level
DPMS Mode
High - Chip on state
On
Moderate - Chip standby
Off
Low - Chip suspend
Off
Lowest - Chip off state
Off
In simultaneous display mode with hardware DPMS
set, DPMS states are sequenced by the timer, pin, and
register bits that control the chip power states.
Revision 1.3 September 8, 1999
-88
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GR28-27 – GPIO Control ................................................. RW
15-8 GPIO Direction 7-0
0 Read .....................................................default
1 Write
7-0 GPIO Data 7-0.......................................... default = 0
GR2F – Miscellaneous Internal Control......................... RW
7
PCLK Control
0 VGA Compatible................................... default
1 PCLK equals VCLK
........................................ always reads 0
6
Reserved
5
Hsync Skew Control
0 One skew in graphics, two skew in text . default
1 No skew
........................................ always reads 0
4-3 Reserved
2
Double Logical Line Width
0 Disable................................................... default
1 Enable
1
Text Mode Display FIFO Prefetch Cycles Select
0 Multiple of 8 .......................................... default
1 Multiple of 4
0
Enable Display FIFO Threshold Control
0 Disable................................................... default
1 Enable (can also be enabled by AR10[0])
GR2A – Suspend Pin Timer ............................................. RW
7
Motion Video Port Suspend
0 Disable ...................................................default
1 Enable
........................................ always reads 0
6-0 Reserved
GR2C – Miscellaneous Pin Control ................................. RW
........................................ always reads 0
7
Reserved
6
Use PDINV pin as GPIO5
0 Disable ...................................................default
1 Enable
........................................ always reads 0
5-4 Reserved
3
Use INT# pin as PSTATUS
0 Disable ...................................................default
1 Enable
2
Tristate P35-0, DE, SFCLK, LP, FLM
0 Tristate ...................................................default
1 Enable
1
Tristate ENPVEE, ENPVDD, ENPBLT
0 Tristate ...................................................default
1 Enable
........................................ always reads 0
0
Reserved
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Scratch Pad Registers
These registers are reserved for use by software.
GR5A – Scratch Pad 0 ...................................................... RW
GR5B – Scratch Pad 1 ...................................................... RW
GR5C – Scratch Pad 2 ...................................................... RW
GR5D – Scratch Pad 3 ...................................................... RW
GR5E – Scratch Pad 4 ...................................................... RW
GR5F – Scratch Pad 5....................................................... RW
Revision 1.3 September 8, 1999
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VGA Extended Registers – CRT Controller Indexed
CR1A – Arbitration Control 1 ........................................ RW
7-0 Display Queue Kill Counter .................... default = 0
Controls how many requests can be accepted by the
arbiter before changing the owner to another agent
(00 disables the counter).
CRE – CRT Module Test.................................................. RW
7
Extended Memory Access Above 256KB
0 Disable ...................................................default
1 Enable
6
VGA Misc Output Register (3C2) Write Protect
0 Writes to 3C2 Allowed...........................default
1 Write Protect 3C2
5
CRT Start Address Bit-16
....................................... alwatys reads 0
4-3 Reserved
2
Interlaced Mode
0 Disable ...................................................default
1 Enable
1-0 Reserved for Test (Do Not Program) .... default = 0
CR1B – Arbitration Control 2......................................... RW
7-0 High Priority Arbiter Kill Counter ........ default = 0
Controls how many requests can be accepted by the
arbiter before changing the owner to another agent
(00 disables the counter).
CR1C – Arbitration Control 3 ........................................ RW
7-0 Low Priority Arbiter Kill Counter ......... default = 0
Controls how many requests can be accepted by the
arbiter before changing the owner to another agent
(00 disables the counter).
CR19 – CRT Interlace Control ........................................ RW
7-0 Interlaced Vsync Adjust Value
Revision 1.3 September 8, 1999
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CR1F – Software Programming ...................................... RW
........................................ always reads 0
7-4 Reserved
3-0 Display Memory Size
0011 1MB
0111 2MB
1111 4MB
0100 8MB
All other codes are reserved
Memory size is automatically detected during system setup.
CR29 – RAMDAC Mode ................................................. RW
7
External DAC
0 Disable.................................................... defaul
1 Enable
........................................ always reads 0
6
Reserved
5-4 CRTC Offset[9:8] for High or True Color Modes
3
GE I/O Decode
0 Disable.................................................... defaul
1 Enable
2
RAMDAC
0 External .................................................. defaul
1 Internal
1-0 RS[3-2] for RAMDAC (if register access definition
is selected)
This register is write protected by SRE_New[7]
CR20 – Command FIFO ................................................... RW
........................................ always reads 0
7-6 Reserved
5
Write Buffer
0 Disable ....................................................defaul
1 Enable
4
16-Bit Planar Mode
0 Disable ....................................................defaul
1 Enable
........................................ always reads 0
3-0 Reserved
CR2A – Interface Select ................................................... RW
........................................ always reads 0
7
Reserved
6
Internal Data Path Width
0 8/16-bit ................................................... defaul
1 32-bit
...................................... always reads 1
5
Reserved
4
Power Down Mode Using ROMCS#
0 Enable..................................................... defaul
1 Disable
........................................ always reads 0
3-0 Reserved
This register is write protected by SRE_New[7]
CR21 – Linear Addressing ............................................... RW
........................................ always reads 0
7-6 Reserved
5
Linear Memory Access
0 Disable ....................................................defaul
1 Enable
........................................ always reads 0
4-0 Reserved
This register is write protected by SRE_New[7].
CR22 – CPU Latch Readback ...........................................RO
7-0 Latched Data
Pointed to by GR4 (VGA Read Map Select Register
)
CR24 – VGA Attribute State.............................................RO
7
VGA Attribute State
0 Index ......................................................defaul
1 Data
........................................ always reads 0
6-0 Reserved
CR25 – RAMDAC Read/Write Timing ........................... RW
7
PCLK / P[7-0] BufferTristate Control
0 Enable......................................................defaul
1 Disable
........................................ always reads 0
6-4 Reserved
3-0 RAMDAC Read / Write Wait States..... def =1111b
CR27 – CRT High Order Start Address ......................... RW
7
Vertical Total Bit-10 ................................ default = 0
6
Vertical Blanking Start Bit-10 ............... default = 0
5
Vertical Retrace Start Bit-10 ................. default = 0
4
Vertical Display Enable End Bit-10 ....... default = 0
3
Line Compare Bit-10 .............................. default = 0
2-0 Start Address Bits 19-17 ......................... default = 0
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CR2B – Horizontal Parameter Overflow ........................ RW
........................................ always reads 0
7-5 Reserved
4
Horizontal Blank Start Bit-8................... default = 0
3
Horizontal Retrace Start Bit-8 ............... default = 0
2
Horizontal Interlace Parameter Bit-8 ... default = 0
1
Horizontal Display Enable Bit-8 ............ default = 0
0
Horizontal Total Bit-8 ............................ default = 0
CR35-34 – Graphics Engine I/O Linear Address Base . RW
15-0 Graphics Engine Linear Address Base ... default = 0
CR36 – Graphics Engine / Video Engine Control.......... RW
7
Graphics Engine
0 Disable................................................... default
1 Enable
6
PCI Video Minifier
0 Bypass ................................................... default
1 Go through minifier
5
Video Aperture
0 Disable................................................... default
1 Enable
4
Graphics Engine Software Reset
Writing a one to this bit resets the graphics engine
3
Graphics Engine I/O
0 Disable................................................... default
1 Enable
2
String Write
0 Disable................................................... default
1 Enable
1-0 Graphics Engine Register Mapping
00 I/O mapped at 21xxh ............................. default
01 Memory mapped at B7Fxxh
10 Memory mapped at BFFxxh
11 Memory mapped using the GE base register
CR2D – GE Timing Control ............................................. RW
........................................ always reads 0
7-5 Reserved
4-3 GE Sample Clock Delay Selection .......... default = 0
2-0 GE Frame Buffer Read Delay Cycles..... default = 0
CR2F – Performance Tuning ........................................... RW
........................................ always reads 0
7
Reserved
6
DRAM Refresh Cycle Control Bit-1
(Bit-0 is CR11[6])
00 3 refresh cycles per horizontal line
01 5 refresh cycles per horizontal line
10 1 refresh cycles per horizontal line
11 2 refresh cycles per horizontal line
5
Blank TimingSelect
0 Normal blank..........................................default
1 Blank is the inverse of display enable
4
Display FIFO Depth Control
0 32 deep ...................................................default
1 8 deep
3-2 Memory Read Ready Control
00 -reserved.................................................default
01 Fast read cycle (same as 10)
10 Fast read cycle (same as 01)
11 Normal read cycle
1
Clock Source
0 VCLK2
1 VCLK1 ..................................................default
0
Pin Scan (Test Only) ................................ default = 1
Revision 1.3 September 8, 1999
CR37 – I2C / SMB Control .............................................. RW
7
SMBCLK Buffer is Open Drain........ always reads 1
6
I2C SMBCLK Status ............................................RO
........................................ always reads 0
5-4 Reserved
3
I2C Operation
0 Read .................................................... default
1 Write
........................................ always reads 0
2
Reserved
1
I2C SMBCLK Signal
0 Low
1 High ................................................... default
0
I2C SMBDAT Signal
0 Low .................................................... default
1 High
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CR38 – Pixel Bus Mode .................................................... RW
........................................ always reads 0
7-6 Reserved
5
Packed 24-Bit True-Color Mode
0 Disable ...................................................default
1 Enable
4
Standard VGA Mode in 64-Bit Configuration
0 Disable ...................................................default
1 Enable
3
True Color Mode
0 Disable ...................................................default
1 Enable
2
High Color Mode
0 Disable ...................................................default
1 Enable
........................................ always reads 0
1
Reserved
0
16-Bit Pixel Bus
0 Disable ...................................................default
1 Enable
This register is protected by SRE_New[7]
CR3A – Physical Address Control .................................. RW
........................................ always reads 0
7
Reserved
6
AGP / PCI Select
0 PCI .................................................... default
1 AGP
5
Both IO
0 Disable................................................... default
1 Enable
4
Memory Address Linearization
0 Disable................................................... default
1 Enable
........................................ always reads 0
3
Reserved
2
AGP Software Reset
0 Normal................................................... default
1 Reset
1
PCI Configuration Subsystem ID Write
0 Disable................................................... default
1 Enable
0
Enhanced Register I/O Scheme
0 Disable................................................... default
1 Enable
CR39 – PCI Interface Control ......................................... RW
7
Pixel Data Format
0 Little Endian...........................................default
1 Big Endian
6-5 Memory Data with Big Endian Format
00 Pass Through (PT) .................................default
01 Word Swap (WS)
10 Half Swap (HS)
11 Full Swap (FS)
4-3 BE[3-0]# With Big Endian Format
00 Pass Through (PT) .................................default
01 Word Swap (WS)
10 Half Swap (HS)
11 Full Swap (FS)
2
PCI Burst Write
0 Disable ...................................................default
1 Enable
1
PCI Burst Read
0 Disable ...................................................default
1 Enable
0
MMIO Control.....default set from Inverted MA??
0 Disable
1 Enable (64KB VGA I/O space can be memory
mapped within the 4GB memory space)
This register is protected by SRE_New[7]
CR3B – Clock and Tuning ............................................... RW
7
Observe Clock Source
0 VCLK1 .................................................. default
1 VCLK2
6-4 Clock Source Mode Select
0xx Internal Clock Chip
000 V/MCLK test mode, observe MCLK
001 V/MCLK test mode, observe VCLK1
010 V/MCLK test mode, observe VCLK2
011 Normal operation
1xx External Clock Chip
Bit 6 default is set from MA?? inverted
Bits 5-4 default to 00
3
Clock Control
0 When bits 6-4 = 00x, clock is normal.... default
1 When bits 6-4 = 00x, clock is divided by 2
........................................ always reads 0
2-1 Reserved
0
Vertical Retrace Memory Refresh
0 Disable
1 Enable................................................... default
This register is protected by SRE_New[7]
Revision 1.3 September 8, 1999
CR3C – Miscellaneous Control ....................................... RW
7-3 Same Definition as GRF[7-3]................... default = 0
........................................ always reads 0
2
Reserved
1
Same Definition as GRF[1] ...................... default = 0
0
Mode Select 1............................................ default = 0
0 This register has no function.................. default
The original GRF[7-0] bits are used
1 GRF[7-3, 1] accessed via this register only
GRF[2, 0] accessed at original register only
Original GRF[3] is R/W but has no function
This register is protected by SRE_New[7]
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Hardware Cursor Registers
CR50 – Hardware Cursor Control ................................. RW
7
Hardware Cursor Enable
0 Disable .................................................. default
1 Enable
6
Hardware Cursor Mode
0 MS Windows™ Compatible ................. default
1 X11 Compatible
5
Hardware Cursor Color Control 3
0 Disable .................................................. default
1 Enable
4
Hardware Cursor Color Control 2
0 Disable................................................... default
1 Enable
........................................ always reads 0
3-2 Reserved
1-0 Hardware Cursor Size
00 128x128 ................................................ default
01 64x64
10 32x32
11 -reserved-
The ProMedia supports a Windows® compatible hardware
cursor. The hardware cursor operates only in extended planar
and packed pixel modes. The cursor size can be selected
between 32x32 and 64x64. Two 2-bits-per-pixel images
define the cursor shape. The table below shows how these
two bits operate on each pixel. The hardware cursor pattern
is stored in off-screen memory.
Table 11. Hardware Cursor Pixel Operation
Plane 0 Plane 1
Pixel Operation
Pixel Operation
(AND) (XOR)
(Windows®)
(X11)
1
0
Transparent
Cursor BG Color
1
1
VGA Data Inversion
Cursor FG Color
0
1
Cursor FG Color
Transparent
0
0
Cursor BG Color
Transparent
CR43-40 – Hardware Cursor Position ............................ RW
........................................ always reads 0
31-28 Reserved
27-16 Hardware Cursor Position Y Dimension
........................................ always reads 0
15-12 Reserved
11-0 Hardware Cursor Position X Dimension
CR45-44 – Hardware Cursor Pattern Location ............. RW
........................................ always reads 0
15-12 Reserved
11-0 Hardware Cursor Map Mask Storage Location
1KB aligned in the frame buffer
CR47-46 – Hardware Cursor Offset................................ RW
........................................ always reads 0
15 Reserved
14-8 Hardware Cursor Position Y-Offset
........................................ always reads 0
7
Reserved
6-0 Hardware Cursor Position X-Offset
CR4F-48 – Hardware Cursor Color ................................ RW
........................................ always reads 0
63-56 Reserved
55-32 Hardware Cursor Background Color
........................................ always reads 0
31-24 Reserved
23-0 Hardware Cursor Foreground Color
Revision 1.3 September 8, 1999
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Additional CRTC Extended Registers
CR51 – Bus Grant Termination Control......................... RW
7-0 Bus Grant Termination Position
This regiester is active if CR52[6] = 1
CR5E – Capture / ZV Port Control ................................ RW
7
Capture Idle......................................................... RO
6
Capture Command Port
0 Disable................................................... default
1 Enable new command port (2203-2200h)
........................................ always reads 0
5-3 Reserved
2
PCI I/O Write Retry
0 Disable................................................... default
1 Enable
1
PCI I/O Read Retry
0 Disable................................................... default
1 Enable
0
Capture Interface
0 Disable................................................... default
1 Enable
This bit is protected by SRE_New[7]
CR52 – Shared Frame Buffer Control ............................ RW
7, 5 Shared Frame Buffer (SFB)
00 Disable ...................................................default
01 Enable SFB slave mode 1 (8ma I/O buffer)
10 Enable SFB master mode
11 Enable SFB slave mode 2 (16ma I/O buffer)
6
Bus Grant Termination Position Control
0 Disable ...................................................default
1 Enable
........................................ always reads 0
4
Reserved
3-0 Bus Grant Low Pulse (MCLKs) ...........def = 0010b
CR55 – PCI Retry Control ............................................... RW
7
PCI Retry in Memory Write Command
0 Disable ...................................................default
1 Enable
6
PCI Retry in Memory Read Command
0 Disable ...................................................default
1 Enable
5-0 Number of PCICLKs * 2 for STOP#....... def = 0Fh
Number of PCICLKs, multiplied by 2, for generating
STOP# during the first data phase
CR5F – Test Control ........................................................ RW
7
Internal Control Test Output
0 Normal................................................... default
1 Internal control signals are output to P15-0
P15 GEREQ
P14 GEBUSY
P13 CMDIN
P12 GEWAIT
P11 CMATCH
P10 KGECYC
P9
WBMT
P8
GERTRY
P7
BLANKTV
P6
WRSTY
P5
WRSTU
P4
WRSTV
P3
WRST1
P2
Y0EN
P1
UEN
P0
YUVEN
6
Capture Input Interrupt Polarity Select
0 Normal................................................... default
1 Test data is output to pixel bus P15-0
........................................ always reads 0
5-1 Reserved
0
Stop DISPQ REQ Test
0 Normal................................................... default
1 Stop DISPQ REQ
CR56 – Display Pre-end Fetch Control ........................... RW
........................................ always reads 0
7-2 Reserved
1
Display Queue Pre-end Fetch
0 Disable ...................................................default
1 Enable
0
Display Queue Pre-end Fetch Parameter Bit-8
Used with CR57 ......................................... default = 0
CR57 – Display Pre-end Fetch Parameter ...................... RW
7-0 Display Queue Pre-end Fetch Parameter Bit-8
Used with CR56[0] .....................................default n/a
Revision 1.3 September 8, 1999
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CR62 – Enhancement 0..................................................... RW
7
Pause GE Operation (GEPAUSE)
0 Normal GE Operation ............................default
1 Pause GE Operation
6
PCI Retry for GE (ENGERTRY)
0 Disable ...................................................default
1 Enable
5
Short Command (ENSHRT)
0 Disable ...................................................default
1 Enable
4
Direct Read Even if GE is Busy (ENDIRRD)
0 Disable ...................................................default
1 Enable
........................................ always reads 0
3
Reserved
2
Low Priority Arbitration Policy
0 Fixed Priority
1 Round Robin .........................................default
1
High Priority Arbitration Policy
0 Fixed Priority .........................................default
1 Round Robin
0
Frame Buffer Memory Size Select
0 8MB .....................................................default
1 4MB
Revision 1.3 September 8, 1999
CR63 – Enhancement 1 .................................................... RW
........................................ always reads 0
7-6 Reserved
5-4 Memory Folding Control
00 Normal................................................... default
01 FOLD6
10 FOLD7
11 -reserved........................................ always reads 0
3-2 Reserved
1-0 Extended FIFO Latency Control (LATV[5-4])
Combined with CR30
CR64 – DPA Extra ........................................................ RW
7
DPA On/Off
0 On
.................................................... default
1 Off
6
DPA Bypass
0 Normal................................................... default
1 Bypass
5-3 Reference Feedback Clock Delay
Maximum 2ns............................................. default = 0
2-0 Reference Internal Clock Delay
Maximum 2ns............................................. default = 0
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used. If W1 is in planar mode, then W1-Y is the first live
video Y-component storage area, and W1-U (V) is the first
live video U (V) -component storage area. In the following
register definitions, a register with W1 (W2) indicates that
this parameter is applicable to the first (second) live video
window only.
Video Display and Capture Engine Registers
The ProMedia integrates video display and capture engines,
which support YUV 4:2:2, YUV12 (planar) or YUV 4:1:1
data formats to accelerate software playback and video
capture functions. Video images can be captured through a
special video capture port or the PCI bus. Dual apertures on
the PCI bus enable graphics and video data to be transported
simultaneously without any software involvement. The video
image can be smoothed through a programmable multi-tap
filter to reduce the jig-jag effect after minification. The video
data can be minified to save bus bandwidth or memory space
and written into offscreen memory. The video display engine
fetches YUV 4:2:2 or planar video data from offscreen
memory and can be scaled up with linear interpolation in both
X and Y directions. The video data stream is converted into a
True Color RGB24 data stream and multiplexed with the
graphics data. Two live video windows can be supported.
The graphics data and video data can be handled smoothly in
different color depths with color key support. A hardware
anti-tear mechanism prevents the tearing effect due to frame
buffer update and eases the burden of software to flip the
page. Since the hardware synchronizes the capture or PCI
video address pointer with the playback VSYNC, the built-in
algorithm ensures the playback frame buffer is free from the
frame update. For the parameters defined here, refer to the
following figures.
)UDPH %XIIHU
*UDSKLFV
'
: <89
:<
'$
:©
&
:8
&
:9
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:
Note that W1’ is defined for the anti-tearing function. W1 is
the first live video storage area and W2 is the second live
video storage area. W1 could be in either packed pixel or
planar format, while W2 can only be packed pixel mode. If
W1 is in packed pixel mode, then W1-U and W1-V are not
Figure 7. Frame Buffer Parameters
96<1&
+6<1&
:
:
*UDSKLFV
1: CR92-CR91, 2: 3X58E-CR8D, 3: CR8B-CR8A, 4: CR87-CR86, 5: CR89-CR88, 6: CR8D-CR8C, 7: SR90-SR8F, 8: SR94-SR93
Figure 8. Live Video Display Parameters
Revision 1.3 September 8, 1999
-98
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:H &&RRQQHFW
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CR81-80 – Window 1 Horizontal Scaling Factor ........... RW
15 Horizontal Minify / Zoom Enable
0 Horizontal Zoom Enable ........................default
1 Horizontal Minify Enable
CR89-86 – Window 1 Video Window Start .................... RW
........................................always reads 0
31-28 Reserved
27-16 Video Window Vertical Start
In pixel delays from the edge of VSYNC
........................................always reads 0
15-12 Reserved
11-0 Video Window Horontal Start
In pixel delays from the rising edge of HSYNC
Minify Enabled:
14-13 Tap 1
12-10 Horizontal Minify Integer (Inverter), Hsrc/Hdst – 1
9-0 Horizontal Minify Factor, (Hdst/Hsrc) * 1024
CR8D-8A – Video Window End ...................................... RW
........................................always reads 0
31-28 Reserved
27-16 Video Window Vertical End
In pixel delays from the edge of VSYNC
........................................always reads 0
15-12 Reserved
11-0 Video Window Horontal End
In pixel delays from the rising edge of HSYNC
Zoom Enabled:
13-0 Horizontal Zoom Factor, (Hdst/(Hsrc-2)-1) * 1024
CR83-82 – Window 1 Vertical Scaling Factor ................ RW
15 Vertical Minify / Zoom Enable
0 Vertical Zoom Enable ............................default
1 Vertical Minify Enable
14 Vertical Filtering
0 Disable ...................................................default
1 Enable
........................................ always reads 0
13-10 Reserved
9-0 Vertical Minify / Zoom Factor (Vdst/Vsrc) * 1024
Revision 1.3 September 8, 1999
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CR8F-8E – Video Display Engine Flags .......................... RW
15 Planar Capture Mode
0 Planar 420 Capture.................................default
1 Planar 422 Capture
14 VSYNC Test / Graphics Engine Reset
0 Disable ...................................................default
1 Enable
13 Edge Recovery Algorithm Control
0 Disable ...................................................default
1 Enable
12 Window 1 Vertical Interpolation
0 Disable ...................................................default
1 Enable
11 Window 1 Horizontal Interpolation
0 Disable ...................................................default
1 Enable
10 CSC / Bypass Select
0 CSC .....................................................default
1 Bypass
9
Line Toggle for Line Buffer
0 Normal ...................................................default
1 Toggle (Reversed)
........................................ always reads 0
8
Reserved
7-5 Window 1 HDEO Delay Adjust .............. default = 4
4
Video Window 1
0 Disable ...................................................default
1 Enable
3
CCIR-/ DTV Input Video Data Control
0 CCIR Format ..........................................default
1 DTV Format
2-1 W1 / W2 Line Buffer Page Break Level Control
00 8 levels ...................................................default
01 16 levels
1x 32 levels
0
Video Window 2
0 Disable ...................................................default
1 Enable
CR91-90 – Window 1 / W1-Y Row Byte Offset .............. RW
........................................ always reads 0
15-14 Reserved
13-0 Video Row Byte Offset
Programmed with the number of bytes in a row
CR94-92 – Window 1 / W1-Y Video Start Address........ RW
........................................ always reads 0
23-21 Reserved
20 Used with CR97 bit-7
19-0 Video Start Addres (in bytes)
Revision 1.3 September 8, 1999
-100
CR95 – Video Window Line Buffer Threshold .............. RW
7
Line Buffer Level Bit-8 (used with CR96)
6-0 W1 / W2 Line Buffer Request Threshold Value
When the line buffer is less than this value, a memory
request will be issued. The value programmed in this
register must be less than the line buffer level (see bit7 and CR96).
CR96 – Window 1 / W1-Y Line Buffer Level Control .. RW
7-0 Line Buffer Levels (bit-8 is in CR95[7])
RGB8: (pixel # + 2) / 8 rounded up
YUV 4:2:2: (Pixel # + 2) / 4 rounded up
For W1-U or W1-V, the level is this value divided by
4 or 16, depending on the panar format (YUV12 or
YUV9)
CR97 – Video Display Engine Flags ................................ RW
7
Start Address Reload Control
0 CR94[4]=0 address can be reloaded any time
1 CR94[4]=0 only reloaded during Vsync
x CR94[4]=1 address not reloaded
6
Video Start Reference Select
0 HSYNC / VSYNC ................................. default
1 Use fixed signals (fixed relationship with HDE
and VDE) as video start reference
5
Address Point Invert
0 Normal................................................... default
1 Invert
4
Odd / Even Invert (Anti-tearing)
0 Normal................................................... default
1 Invert
3
Playback Test Mode Select (RGB Data Select)
2
Playback Test Mode
0 Disable................................................... default
1 Enable
1
Anti-tearing Sync Select
0 VGA Vsync ........................................... default
1 Playback Vsync
0
Anti-tearing
0 Disable................................................... default
1 Enable
This bit is automatically disabled if there is only one
video stream and dual live video mode is enabled. In
this mode, the even field is used for one live video
stream and the odd field is used for the other live
video stream.
CR9A-98 – Capture Video Start Address....................... RW
........................................always reads 0
23-20 Reserved
19-0 Capture Video Start Address
Controlled by SRBE (3C5 index BE).
VGA Extended Registers
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CR9B – Video Display Status ........................................ RWC
7
Capture Interrupt
0 Disable ...................................................default
1 Enable
6
Capture Interrupt Clear..................Write 1 to Clear
5
VGA Vertical Blank............................................. RO
4
Capture Interrupt Status..................................... RO
3
Display Double Buffer Status.............................. RO
2
VDQ (Capture FIFO) Empty .............................. RO
1
Capture VSYNC Status ....................................... RO
0
Capture Video Display Enable (VDE) Status .... RO
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CR9C – Capture Control 1 .............................................. RW
7-6 Frame Capture Control
00 Interlace Capture.................................... default
01 Even/odd 60fps capture
10 Even field 30fps capture
11 Odd field 30fps capture
5
External HDE Select
0 Use Internal HDE .................................. default
1 Use External HDE
4
Capture Enable
0 Disable................................................... default
1 Enable
3
Genlock Enable
0 Disable................................................... default
1 Enable
2
Motion Effect Algorithm
0 Skip 2 lines ............................................ default
1 Skip 1 line
1
Capture Hsync Polarity
0 Normal................................................... default
1 Invert
0
Capture Vsync Polarity
0 Normal................................................... default
1 Invert
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
CR9D – Capture Control 2............................................... RW
7
Capture DTV / CCIR Format Select
0 CCIR .....................................................default
1 DTV
6-4 Horizontal Filter Tap
0xx Bypass ....................................................default
100 2 Tap
101 3Tap
110 5 Tap
111 9 Tap
3
UV Swap
0 Normal ...................................................default
1 Swap
2
YUV Swap
0 Normal ...................................................default
1 Swap
1
Philips 9051 Format Select
0 Normal ...................................................default
1 UV9051 Format
0
TV 8-Bit Control
0 16-bit capture input ................................default
1 8-bit capture input
CR9E – Capture Control 3 ............................................... RW
7-6 Capture Input Data Mode
00 YUV 4:2:2..............................................default
01 YUV 4:1:1
10 RGB 565
11 -reserved5
CGS Clock Double
0 Normal ...................................................default
1 Double
4
Capture Clock Polarity
0 Normal ...................................................default
1 Invert
3-2 Capture Clock Delay Select
00 No delay .................................................default
01 3 ns
10 6 ns
11 9 ns
1
Hsync Delay
0 Normal ...................................................default
1 Delay
0
PCI Frame Start and Busy
0 PCI Video Not Busy...............................default
1 PCI Video Busy
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CR9F – Capture Control 4 .............................................. RW
7-6 Capture Interrupt Source
00 Capture vsync ........................................ default
01 Capture even field
10 Capture odd field
11 Capture blank
5
IBM MPEG2 Mode Enable
0 Normal................................................... default
1 IBM MPEG2 Mode
4
Production Test Mode for Capture
0 Normal................................................... default
1 For test purposes, the ESYNC# pin is used
instead of capture Vsync and EDCLK# is used
instead of external CLK
3-1 Capture Clock Divide Factor Select
Capture clock divide factor when the internal pixel
clock is source:
000 Divide by 1 ............................................ default
001 Divide by 2
010 Divide by 3
011 Divide by 4
100 Divide by 5
101 Divide by 6
110 Select 14.318 MHz Clock
111 Select 28.636 MHz Clock
0
Capture Clock Select
0 Use external capture clock..................... default
1 Use internal pixel clock divided by the factor
above
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
CRA1-A0 – Capture Vertical Total ................................. RW
........................................ always reads 0
15-11 Reserved
10-0 Capture Vertical Total
CRA3-A2 – Capture Horizontal Total ............................ RW
........................................ always reads 0
15-9 Reserved
8-0 Capture Horizontal Total
CRA5-A4 – Capture Vertical Start ................................. RW
........................................ always reads 0
15-11 Reserved
10-0 Capture Vertical Start
CRA7-A6 – Capture Vertical End ................................... RW
........................................ always reads 0
15-11 Reserved
10-0 Capture Vertical End
CRA9-A8 – Capture Horizontal Start ............................. RW
........................................ always reads 0
15-10 Reserved
9-0 Capture Horizontal Start
CRAB-AA – Capture Horizontal End ............................. RW
........................................ always reads 0
15-10 Reserved
9-0 Capture Horizontal End
CRAC – Capture Vertical Sync Pulse Width ................. RW
........................................ always reads 0
7-4 Reserved
3-0 Capture Vertical Sync Pulse Width
CRAD – Capture Horizontal Sync Pulse Width ............. RW
........................................ always reads 0
7-6 Reserved
5-0 Capture Horizontal Sync Pulse Width
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CRAE – Capture CRTC Control .................................... RW
7
Time Base
0 One Time Base ...................................... default
1 Two Time Base
6
Frame Reset
0 Field reset .............................................. default
1 Frame reset
5
Capture Clock Divide by 2
0 Select original capture clock.................. default
1 Select inverted capture clock before divide by
two
4
Odd / Even Field Invert
0 Normal................................................... default
1 Invert
3
CRTC Hsync Load
0 Enable .................................................... default
1 Disable
2
CRTC Vsync Load
0 Enable .................................................... default
1 Disable
1
CRTC Horizontal Reset
0 Enable .................................................... default
1 Disable
0
CRTC Vertical Reset
0 Enable .................................................... default
1 Disable
CRAF – Capture CRTC Control .................................... RW
7
Video Exist Select
0 Video exist capture ................................ default
1 Always capture
6
Capture Sync and Direct
0 Input .................................................... default
1 Output
........................................always reads 0
5
Reserved
4
Capture CRTC Input Clock Mode
0 Normal................................................... default
1 Clock divided by 2 when in 8-bit pixel bus
mode
3
External CRTC Input Clock Mode
0 Clock devided by 1 ................................ default
1 Clock devided by 2
2
External Pixel Clock Mode
0 Clock devided by 1 ................................ default
1 Clock devided by 2
1
CRTC Mode
0 Targa Mode ........................................... default
1 XPCV Mode
0
MPEG2 Vsync Select
0 Original Vsync....................................... default
1 Field ID
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
CRB1-B0 – Capture Horizontal Minify Factor .............. RW
........................................ always reads 0
15 Reserved
14-10 Planar Capture FIFO Level (for both U and V)
9-0 Capture Horizontal Minify Factor
CRB3-B2 – Capture Vertical Minify Factor................... RW
........................................ always reads 0
15 Reserved
14-10 Planar Capture FIFO Threshold (for both U & V)
9-0 Capture Vertical Minify Factor
CRB5-B4 – DST Pixel Width Count ................................ RW
........................................ always reads 0
15-12 Reserved
11-0 DST Pixel Width Count
CRB7-B6 – DST Pixel Height Count ............................... RW
........................................ always reads 0
15-11 Reserved
10-0 DST Pixel Height Count
CRB8 – Capture FIFO Control 1 .................................... RW
7-6 Capture FIFO Page Break
00 8 level.....................................................default
01 16 level
1x 32 level
5
Interlace Double Buffering
0 Disable ...................................................default
1 Enable
4-0 Capture FIFO Level Control
0 Targa Mode ............................................default
1 XPCV Mode
CRB9 – Capture FIFO Control 2 .................................... RW
7
ENNENZOOM
6
Planar 422 Display
0 Disable ...................................................default
1 Enable
5
Planar Mode Window Indicator
Indicate which window is in planar mode
4-0 Capture FIFO Request Threshold Control
0 Targa Mode ............................................default
1 XPCV Mode
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CRBB-BA – Chromakey Comp Data 0 Low .................. RW
15-0 Chromakey Compare Data 0 (Lower Threshold
CRBD-BC – Chromakey Comp Data 0 High ................. RW
15-0 Chromakey Compare Data 0 (Higher Threshold
CRBE – Capture Control ................................................ RW
........................................always reads 0
7-6 Reserved
5
Video WBUF Status ............................................ RO
0 Empty .................................................... default
1 Not empty
4
Second Aperture Direct Access (bypass video
capture)
3
Interpolation Control
2
Video Engine Clock Enable
0 Off
.................................................... default
1 On
1
Flicker-Free Function
0 Disable................................................... default
1 Flicker-free when input is in interlace mode
........................................always reads 0
0
Reserved
CRBF – Display Engine Flags 4 ...................................... RW
7
Video Line Buffer Read Reset Select ......default = 0
6-4 Window 2 Video Data Format
000 YUV 422 ............................................... default
001 -reserved010 RGB 16
011 -reserved1xx -reserved3
Interpolation Bypass 1 ............................default = 0
2-0 Window 1 Video Data Format
000 YUV 422 ............................................... default
001 -reserved010 RGB 16
011 -reserved1xx -reserved-
VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Digital TV Control Registers
VGA Extended Registers – CRTC Shadow
CRD3-D0 – VGA / Digital TV Sync Control 1................ RW
........................................ always reads 0
31-27 Reserved
26-16 Vertical Data Load
15 VGA Slave Mode for DTV
0 Disable ...................................................default
1 Enable
14 H/V Data Load
0 Disable ...................................................default
1 Enable
13 Digital Hsync Direction
0 Input .....................................................default
1 Output
........................................ always reads 0
12-9 Reserved
8-0 Horizontal Data Load
Read/Write of Shadow registers is controlled by extended
register GR30[6] (port 3CE/3CF index 30h). If GR30[6]=1,
read/write operations to CRTC indices 0, 3-7, 10-11, and 16
are performed to the shadow registers instead of to the normal
registers. Bit definitions for these registers are identical to the
standard CRTC register set.
CR00 – Shadow Horizontal Total ................................... RW
CR03 – Shadow Horizontal Blank End .......................... RW
CR04 – Shadow Horizontal Retrace Start...................... RW
CR05 – Shadow Horizontal Retrace End ....................... RW
CR06 – Shadow Vertical Total ........................................ RW
(see also CRD8, Digital TV Interface Control)
CR07 – Shadow Overflow ................................................ RW
CR10 – Shadow Vertical Retrace Start .......................... RW
CR11 – Shadow Vertical Retrace End ............................ RW
CR16 – Shadow Vertical Blanking End .......................... RW
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VGA Extended Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
3D Graphics Engine Registers
Operational Concept
This section describes how to program the ProMedia graphics
engine for different operations. When the Setup Engine is to
be used, the following steps should be taken to perform the
drawing functions:
• Software sets up the drawing environment.
• Software issues a drawing command.
• Software continuously sends triangles to Setup engine.
• Software sends a triangle with last flag set or a null
triangle to Setup engine to signal end of operation.
From a programmer’s point of view, operations that can be
applied to the ProMedia fall into the following categories:
• Reset: This operation resets the GE to default status.
• Status: This operation returns the GE status.
• Drawing Environment: The operations set environment
for drawing.
• Frame Buffer Control: The operations set control for the
frame buffer.
• Drawing: Draw an object.
• Geometry Primitives: Describe a geometry primitive.
Drawing Environment defines a set of conditions that decide
the operations to be applied to each pixel.
Drawing
Environment operations are straight-forward. There is a
group of registers that defines the drawing environment. By
directly setting these registers, a program can control the
drawing environment.
Frame Buffer Control decides how to access the frame buffer.
Like the Drawing Environment, there is a group of registers
that define the frame buffer access. By directly setting these
registers, a program can control frame buffer access.
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Drawing
Bitblt - Frame Buffer to Frame Buffer
A Note on CPU as the Source of Operation
Blt operation may involve a pattern. If it does, and the pattern
is stored in the frame buffer, the pattern parameters (P1, P2,
P3) must also be set. The following registers must be set to
provide the source and destination rectangles of blt: Ps1, Pd1,
Ps2, and Pd2. These registers can be set in any order. If a
register is set several times, only the last one is effective.
After all the registers are set, the program starts blting by
writing a blt command to Command Register.
Any operation that uses the CPU as the source of operation
(such as the Blt shown in section x) requires the host CPU to
feed data into data registers III and IV (BA+56 and 60). Since
the ProMedia is using the 64-bit internal data path, any data
(32-bit) from the CPU will be packed into 64-bit before use.
Therefore, there are two registers for the CPU to write. These
two registers are arranged as shown in the following diagram.
Bitblt - CPU to Frame Buffer
'DWD 5HJLVWHU ,9
%$
The operation for blting from the CPU is similar to the blting
from the frame buffer except that Ps1 and Ps2 are not needed
and the data from the CPU must immediately follow the
setting of the Command Register.
For all commands that require data from the CPU, the
command and data are considered atomic; i.e., the data should
follow the command immediately and no other command or
parameter can be placed in between. The data can be written
to Data Register III and IV. Alternatively, it can be written to
a memory-mapped space designated by ProMedia apertures.
The same rule applies to drawing text from the CPU to the
frame buffer.
'DWD 5HJLVWHU ,,,
%$
Writing to Data Register IV triggers data in both registers to
be sent to the engine for processing. However, the hardware
may expose the two registers as a mapped space to save
software from toggling between the two registers.
Geometry Primitive
To draw a geometry primitive, the host must issue a drawing
command by writing to the Command Register first and then
set up the geometry as described in later in this document.
Text
Text glyph can be from the CPU or the frame buffer. When
the glyph is from the CPU, the registers to be set are Pd1 and
Pd2 for text location. When the glyph is stored in the frame
buffer, the registers to be set are Ps1, Ps2, Pd1, and Pd2 to
provide both the glyph and text locations. These registers can
be set in any order. If a register is set several times, only the
last one is effective. After all the registers are set, the program
starts blting by writing a text command to Command Register.
The major difference between text and Blt is that a text source
data is 8-bit aligned while the bitblt is 64-bit aligned. That is,
for text, each new line starts at the byte boundary, while for a
bitblt, at the 64-bit boundary.
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Geometry Primitives
The ProMedia supports the following geometry primitives:
line, and polygon. Each geometry primitive can be further
modified for 3D, shading, and texture mapping. A different
mechanism, called sequential loading, performs the geometry
primitive set up operation.
Loading Mechanism
There are two ways to set up a geometry primitive, random
loading and sequential loading. Like the random access, the
order is not important in random loading, but the address is.
Writing to a certain address in the register space causes a
certain pre-determined action. On the other hand, like
sequential access, the order decides the data semantics in
sequential loading. The ProMedia uses sequential loading in
the Rasterization Engine and the Setup Engine.
In the ProMedia, parameters don’t have to be the fixed
addresses. ProMedia parameters are treated as a data stream
and interpreted based on the type of primitive. Parameters
must be set in a stream as follows:
6WUHDP %\WHV
'DWD
6WUHDP +HDG
3DUDPHWHU 3
3DUDPHWHU 3
3DUDPHWHU 3Q
3DUDPHWHU Q
P1 is the number of bytes for parameter 1, P2-P1 for
parameter 2, etc.
For the Rasterization Engine, there are 9 kinds of parameters:
Bresenham Edge, DDA Edge, Z, Texture, Perspective, Color,
Specular/fog Start, Specular, and Fog. Parameters must
appear in the following order:
Edge(Major), Texture, Perspective, Color, Specular/fog Start,
Specular, Fog, Z, Edge(Minor)
There are two kinds of edges and only one kind can appear in
a parameter stream. Bresenham Edge can only appear in 2D
primitives (without values for iterators).
For the Setup Engine, there is only one kind of parameter:
vertex. However, each primitive could have one or three
vertices. The size of each vertex is variable depending on
triangle attribute.
Only polygon and line primitives can use this sequential
loading feature. In the following sections, each primitive is
addressed in detail.
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Polygon
General polygons can only be drawn by directly using the
Rasterization Engine. In the ProMedia, all polygons must be
Y-monolithic, meaning, when walking from the vertex with
minimal Y to the vertex with maximum Y, the Y coordinates
of the vertices are monolithically increased. A polygon is
drawn by drawing a series of segments:
Sequence Content
0
Drawing Command (Polygon)
1
Full Polygon Segment
2
Polygon Segment (Full or Partial)
3
Polygon Segment (Full or Partial)
….
n
….
Polygon Segment (Full or Partial) or a Null Primitive
A partial segment consists of only one primitive type and one
minor edge parameter. A full segment consists of one
primitive type, edge parameter(s), and interpolation
parameters (Z, color, texture, etc.). The rule is whenever a
new major edge is in the segment a full segment must be used,
otherwise a partial segment has to be used.
Most bit fields in primitive type define the data to be loaded to
Rasterization Engine. If the “Re-load” bit is set, they also
define the data set to be passed to Pixel Engine. The primitive
type of the first and only the first segment must have the “Reload” bit set to signal Rasterization Engine the data set to be
passed to Pixel Engine. The primitive type of the last and
only the last segment must have the “Last” bit set to signal the
end of the sequence. The last of the primitive can be a Null
primitive (others must be polygon). Null primitive has no
parameter.
This mechanism can be used to draw a single polygon, as well
as multiple polygons with the same attributes (e.g. 3D texture
mapped). All that is required is that somewhere in the
sequence we pass a full segment with starting edges of a new
polygon.
Revision 1.3 September 8, 1999
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The following example shows how to draw two shaded
polygons.
Sequence Content
0
Drawing Command
1
Full Segment including
Primitive Type: Re-loading, Major & minor edge, color
Major edge L1
Color Parameter for L1
Minor edge L2
2
Partial Segment including
Primitive Type: minor edge
Minor Edge L3
3
Full Segment including
Primitive Type: Major edge, color
Major Edge L4
Color for L4
4
Partial Segment including
Primitive Type: Minor edge
Minor Edge L5
5
Full Segment including:
Primitive Type: Major & minor edge, color, negative scan
direction
Major edge L6
Color Parameter for L6
Minor edge L7
6
Partial Segment including:
Primitive Type: Minor edge, “Last”
Minor Edge L8
/
/
/
/
/
/
/
/
The following sections are about complete segments (a full
segment with both major and minor edges) with different
attributes. A normal full segment may not have the minor
edge parameter. A partial segment has no other parameters
except the minor edge.
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
2-D
Sequence
0
1
2
Content
Primitive Type
Major Edge Parameter
Minor Edge Parameter
3-D
Sequence
0
1
2
Content
Primitive Type
Major Edge Parameter
Minor Edge Parameter
3-D Shaded
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Z Parameter
3
Color Parameter
4
Alpha Parameter (optional)
5
Minor Edge Parameter
Texture Mapped Shaded
Without perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Texture Coordinate Parameter
3
Optional Auxiliary Texture Data Parameter for
linear interpolation
4
Color Parameter
5
Minor Edge Parameter
Texture Mapped
Without perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Texture Coordinate Parameter
3
Optional Auxiliary Texture Data Parameter for
linear interpolation
4
Minor Edge Parameter
With perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Texture Coordinate Parameter
3
Auxiliary Texture Data Parameter
4
Perspective Factor Parameter
5
Color Parameter
6
Alpha Parameter (optional)
7
Minor Edge Parameter
With perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Texture Coordinate Parameter
3
Auxiliary Texture Data Parameter
4
Perspective Factor Parameter
5
Minor Edge Parameter
Shaded
Sequence
0
1
2
3
4
3-D Texture Mapped Shaded
Without perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Z Parameter
3
Texture Coordinate Parameter
4
Optional Auxiliary Texture Data Parameter for
linear interpolation
5
Color Parameter
6
Alpha Parameter (optional)
7
Minor Edge Parameter
Content
Primitive Type
Major Edge Parameter
Color Parameter
Alpha Parameter
Minor Edge Parameter
3-D Texture Mapped
Without perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Z Parameter
3
Texture Coordinate Parameter
4
Optional Auxiliary Texture Data Parameter for
linear interpolation
5
Minor Edge Parameter
With perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Z Parameter
3
Texture Coordinate Parameter
4
Auxiliary Texture Data Parameter
5
Perspective Factor Parameter
6
Color Parameter
7
Alpha Parameter (optional)
With perspective correction:
Sequence Content
0
Primitive Type
1
Major Edge Parameter
2
Z Parameter
3
Texture Coordinate Parameter
4
Auxiliary Texture Data Parameter
5
Minor Edge Parameter
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Triangle
Synchronization
Triangles can be drawn using the Polygon Mechanism
described above. Additionally, triangles can also be drawn by
using the Setup Engine if they meet certain criteria. Triangles
and polygons can also be freely mixed in a drawing sequence.
The ProMedia supports stand-alone triangles as well as a
triangle list in a sequence as follows:
Reset and status operations can be performed in any order and
at any time including in the middle of another operation.
However, be aware of the consequence (reset) and what to
expect (status).
Sequence
0
1
2
3
…
1
Content
Drawing Command (Polygon)
Triangle primitive
Triangle primitive
Triangle primitive
…
Triangle primitive
Generally, Drawing Environment and Frame Buffer Control
operations should be performed before the drawing operation
to take effect.
The primitive operation is considered atomic; i.e., no other
operation (except for status and reset) can be performed inside
a Geometry Primitive operation.
Functional Blocks
Each primitive consists of a triangle attribute and one or three
vertices. The order of the data in each primitive is: Triangle
Attribute, Vertex 0, Vertex 1 (optional), Vertex 2 (optional).
Whether vertices 1 and 2 are to be loaded depends on the
Triangle Attribute. Writing to BA+192 triggers a loading
sequence in the Setup Engine. The order of the data in a
vertex is: Z, RGBA, UV, W, XY. Not every one has to appear
in every vertex. Whether a particular item is present in a
vertex is decided by the Triangle Attribute. For example, the
Data in a stream for a texture mapped triangle strip may look
like: Triangle Attribute, U0V0, X0Y0.
Due to the limited precision of the setup engine, only triangles
smaller than a certain size will be passed. Software will only
pass triangles smaller than 64x128 or 128x64 to the hardware.
Also, delta values of RGBAUVZ across a triangle will be less
than 128. There is no limitation on the delta of W since it is
impossible to exceed 1.
The ProMedia hardware is divided into 6 major functional
blocks. They are:
•
•
•
•
•
•
Bus Interface (BI)
VGA core (VGA)
Setup Engine (SE)
Rasterization Engine (RE)
Pixel Engine (PE)
Memory Interface (MI)
Each functional block conceptually works independently of
other blocks. The term "Graphics Engine (GE)” indicates the
combination of the Setup Engine, the Rasterization Engine,
and the Pixel Engine.
Bus Interface
The bus interface block connects the AGP bus on one side and
the GE and VGA on the other side.
Line
Parameters for line primitives are very similar to their polygon
counter-parts. The differences are as follows:
There are only major edge parameters.
All the dXm values (dRm, dUm, etc.) are ignored.
The following example shows these differences for a texture
mapped primitive:
Sequence
0
1
2
3
4
Polygon Content
Drawing Command
Primitive Type
Major Edge
Texture Parameter
Minor Edge
Line Content
Drawing Command
Primitive Type
Major Edge
Texture Parameter
Using the same mechanism for multiple polygons, multiple
lines can also be drawn by issuing one drawing command.
Revision 1.3 September 8, 1999
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Span Engine
PS1, PS2, PD1, and PD2 are used in blt and text operations to
define source and destination rectangles.
GEbase + 0 - Parameter Source 1 .................................... RW
........................................ always reads 0
31-28 Reserved
27-16 Y-coordinate Parameter Source 1 Start
High 12 bits of parameter source 1 starting address in
Y coordinate
........................................ always reads 0
15-12 Reserved
11-0 X-coordinate Parameter Source 1 Start
Low 12 bits of parameter source 1 starting address in
X coordinate
GEbase + 8 - Parameter Destination 1 ............................ RW
........................................always reads 0
31-28 Reserved
27-16 Y-coordinate Parameter Destination 1 Start
High 12 bits of parameter destination 1 starting
address in Y coordinate
........................................always reads 0
15-12 Reserved
11-0 X-coordinate Parameter Destination 1 Start
Low 12 bits of parameter destination 1 starting
address in X coordinate
GEbase + 4 - Parameter Source 2 .................................... RW
........................................ always reads 0
31-28 Reserved
27-16 Y-coordinate Parameter Source 2 Start
High 12 bits of parameter source 2 starting address in
Y coordinate
........................................ always reads 0
15-12 Reserved
11-0 X-coordinate Parameter Source 2 Start
Low 12 bits of parameter source 2 starting address in
X coordinate
GEbase + C - Parameter Destination 2 ........................... RW
........................................always reads 0
31-28 Reserved
27-16 Y-coordinate Parameter Destination 2 Start
High 12 bits of parameter destination 2 starting
address in Y coordinate
........................................always reads 0
15-12 Reserved
11-0 X-coordinate Parameter Destination 2 Start
Low 12 bits of parameter destination 2 starting
address in X coordinate
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Graphics Engine Core
GEbase + 10 - Right View Display Base Address ........... RW
31 Right View Active
0 Inactive (use VGA style for display start
address) ..................................................default
1 Active (use the base register address in this
register for the display starting address)
........................................ always reads 0
30-24 Reserved
23-0 Right View Display Starting Address
Writing to this register sets Status Register bit-21 to 0. Later
when the address is used to display a frame, the status bit is
changed to 1.
GEbase + 14 - Left View Display Base Address.............. RW
31 Left View Active
0 Disable (only Right View Display Starting
Address is used) .....................................default
1 Enable (Right View Display Starting Address
is used for the right view and this register for
the left view; hardware will use these two
addresses alternately)
........................................ always reads 0
30-24 Reserved
23-0 Left View Display Starting Address
Writing to this register sets Status Register bit-20 to 0. Later
when the address is used to display a frame, the status bit is
changed to 1.
Revision 1.3 September 8, 1999
-113
GEbase + 18 – Block Write Start Address...................... RW
31 Linear Mode
0 Fill a rectangle area................................ default
1 Fill a linear area
........................................always reads 0
30-24 Reserved
23-0 Starting Address (in multiples of 64 bytes)
GEbase + 1C – Block Write Area / End Address ........... RW
Rectangle Area Fill Mode
........................................always reads 0
31-28 Reserved
27-16 Height of the Area
........................................always reads 0
15-12 Reserved
11-0 Width of the Area (in bytes)
Stride is Destination Stride in port 21C0h
Linear Area Fill Mode
31-0 End Address (in multiples of 64 bytes inclusive)
Writing to this register triggers a Memory Set operation.
Color for this operation is specified in the Foreground register.
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + 20 – Graphics Engine Status ............................RO
Writing to this register resets the GE.
31
Bresenham Engine Status
0 Idle
1 Busy
30 Setup Engine Status
0 Idle
1 Busy
29 SP / DPE Status
0 Idle
1 Busy
28 Memory Interface Status
0 Idle
1 Busy (access for screen refresh doesn’t count)
27 Command List Processing Status
0 Idle
1 Busy
26 Block Write Status
0 Idle
1 Busy
25 Command Buffer Status
0 Not full
1 Full
........................................ always reads 0
24 Reserved
23 PCI Write Buffer Status
0 Empty
1 Not empty
22 Z Check Status
0 Engine busy: All Z tests performed so far have
failed in the command being executed.
Engine idle: All Z tests performed in the last
command have failed.
1 Otherwise
Logically, this bit is the OR of all Z test results
performed in the latest command
21 Effective Status
0 Current display base register is not yet
effective (the frame is not displayed)
1 It is effective
20 Left View Status
0 Current display base register is not yet
effective (the frame is not displayed)
1 It is effective
19 Last View Displayed / Being Displayed
0 Right View
1 Left View
........................................ always reads 0
18-11 Reserved
10-0 Scan Line Currently Being Displayed
Revision 1.3 September 8, 1999
-114
There are two input FIFOs to buffer data and commands from
the host, the Command FIFO (8 levels deep) and the
Bresenham FIFO (2 levels deep). Drawing commands,
Drawing Environment, and Frame Buffer Control are routed
through the Command FIFO. Primitive Type and Geometry
Primitives are routed through the Bresenham FIFO.
Commands in the Command FIFO don’t take effect until a
prior command is executed or the task in progress is finished.
Parameters in the Bresenham FIFO don’t take effect until a
prior parameter is phased out (reaches the end of an edge).
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + 24 – Graphics Engine Control ....................... WO
7
Reset
0 Normal operation ...................................default
1 Reset all internal registers and pointers. Reset
is performed by setting this bit to 1 and then
back to 0.
........................................ always reads 0
6-4 Reserved
3-0 Debug Module Select ............................... default = 0
Module to Debug
GE Register 28
000 None
undefined
001 Setup Engine
SE Status
010 Rasterization Engine
RE Status
011 Pixel Engine
PE Status
100 Memory Interface
MI Status
101 Cmd List Ctrl Unit
Cmd List Start Address
110 Cmd List Ctrl Unit
Cmd List End Address
111 -reservedn/a
GEbase + 2C – Graphics Engine Wait Mask ................. RW
31-0 Wait Mask
When writing to this register, hardware will monitor
the value of M (Wait Mask & Status). If M is not 0,
the Graphics Engine (including the RE, SE, PE, and
MI) will not accept new registers from the host CPU
or AGP bus. This register is cleared by the hardware
when M = 0. Only bits 31-28, 26, 23, and 21-20 are
effective (all other bits are ignored).
GEbase + 28 – Graphics Engine Debug ............................RO
31-0 Engine Module Status
(See register 24 bits 3-0 above)
Revision 1.3 September 8, 1999
-115
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Graphics Engine Organization
The ProMedia Graphics Engine consists of the following
units: Setup Engine, Rasterization Engine, and Pixel Engine.
These units are organized as follows:
AGP
Setup Engine
Memory Interface
The interfaces among the components are:
•
•
AGP to Pixel Engine: Set drawing environment registers.
AGP to Rasterization Engine: Set primitives: edge
walking, slopes.
AGP or Setup Engine: Set vertices, culling info.
Setup Engine to Rasterization Engine: Set primitives:
edge walking, slopes.
Rasterization Engine to Pixel Engine: Pixel Data,
addresses and coordinates.
Pixel Engine to Memory Interface: Addresses and
coordinates, pixel data.
Each unit performs the following functions:
•
•
•
Setup Engine: Back face culling, slope calculation.
Rasterization Engine: Edge walking, color interpolation,
Z, texture coordinates, perform perspective correction.
Pixel Engine: Generate addresses and coordinate for all
memory accesses: read/write Z, read texture, read
source/destination, write destination (draw buffer), 2-D
functions, bi/tri-linear interpolation, blending and
modulation, ROP, Z test, alpha test, transparency, etc.
Revision 1.3 September 8, 1999
S/W sets up the drawing environment.
S/W issues a drawing command.
S/W continuously sends triangles to the Setup Engine (or
primitives to the Rasterization Engine).
S/W sends a triangle with last flag set or a null triangle to
the Setup Engine to signal the end of the operation (or its
equivalent to the Rasterization Engine).
Triangles sent to the Setup Engine can be interleaved with
primitives sent to the Rasterization Engine in step 3 above.
Pixel Engine
•
•
•
•
•
•
Rasterization Engine
•
•
When the Setup Engine is to be used, the following steps
should be taken to perform drawing functions:
-116
The Setup Engine uses the same sequential loading
mechanism as in the Rasterization Engine. The order of
loading is: Triangle Attribute, Vertex 0, Vertex 1 (optional),
Vertex 2 (optional). Whether vertex 1 and 2 are to be loaded
depends on the Primitive Type. Writing to BA+4Ch triggers a
loading sequence to the Setup Engine. The order of data in a
vertex is: RGBA, SrgbF, W, UV, Z, XY. Not every one will
appear in every vertex. Whether a particular item will be
present in a vertex is decided by the Triangle Attribute. For
example, the data in a stream for a texture mapped triangle
strip may look like: Triangle Attribute, U0V0, X0Y0.
GEbase + 2C – Setup Engine Status................................. RO
31-0 Overflow Status
This register records setup engine overflow status. For every
triangle, the entire register is shifted left one bit with bit-0 then
set to reflect whether the triangle has slope overflow. This
register is usefuil for debugging purposes. This register
resides in the VGA address space and is not decoded by the
setup engine.
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Setup Engine Registers
GEbase + 30 – Setup Engine Primitive Attribute ........... RW
31 Z Parameter
0 Absent ....................................................default
1 Present (Setup Engine calculates Z slope)
30 Texture Parameter
0 Absent ....................................................default
1 Present (SE calculates Z slope)
29 Perspective Factor Parameter
0 Absent ....................................................default
1 Present (SE calculates W slope)
28 Color Parameter
0 Absent ....................................................default
1 Present (SE calculates color slope)
27 Specular Color Parameter
0 Absent ....................................................default
1 Present (SE calculates specular slope)
26 Fog Parameter
0 Absent ....................................................default
1 Present (SE calculates fog slope)
25 Step Mode
0 Disable ...................................................default
1 Enable (SE will process the next primitive only
when it finishes the current primitive. There is
no parallelism between primitives)
........................................ always reads 0
24-20 Reserved
19-15 LOD Adjust .............................................. default = 0
3.2 signed # to be added to calculate the LOD value
........................................ always reads 0
14-7 Reserved
6
5
4
3
2
1
0
Z Normalization (Setup Engine Only)
0 Disable................................................... default
1 Enable
Flat Mode (applies to diffuse color, alpha, specular
color, and fog)
0 Smooth color or no color ....................... default
1 Flat color. SE sends only starting values to RE
Full Vertex Info
0 Disable................................................... default
1 Enable. Indicates that all vertex data are
needed for the triangle. Software still needs to
set bits 31-25. However in this case, the data
order in a vertex is: X, Y, Z, W, RGBA,
SrgbF, U, V. Even though the vertex actually
contains all the data, software doesn’t
necessarily set this bit. When this bit is not
set, hardware decodes vertex data as described
in the Vertex Register descriptions.
Sub-Pixel Precision (Rasterization Engine Only)
0 Disable................................................... default
1 Enable
Anti-Aliasing (RE Only)
0 Disable (walk at pixel precision) ........... default
1 Enable (walk at sub-pixel precision)
Auto Direction for Scan Line Ends (RE Only)
0 Disable................................................... default
1 Enable. Bits 31-2 must be 0. Scan order is
passed to the Pixel Engine based on the
comparison result of two end points instead of
the bit in the Primitive Type register. Software
should only use this bit for 2D polygons with
Bresenham edge walking.
Bresenham Edge Walking (RE Only)
0 Use DDA to walk through edges ........... default
1 Use Bresenham algorithm to walk through
edges
This register is decoded by the Setup Engine and passed to the
Rasterization Engine by the Setup Engine. This register and
its equivalent part in the Rasterization Engine are “partially”
pipelined in the sense that there are only two levels of pipe for
this register in both engines while there are many levels for
other data. The two levels are the decoding level and the
execution level. Both the Rasterization Engine and the Setup
Engine use this register to decide what kind of operation to
perform and what kind of data stream to expect. It must be set
before any parameter can be loaded.
Revision 1.3 September 8, 1999
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + 3C –Setup Engine Primitive Type ................. WO
Writing to this register signals the Graphics Engine to begin
sequential loading. The engine will interpret the contents of
this register and the Primitive Attribute register to decide the
amount and types of parameters to expect. Like vertices, there
is a FIFO for Triangle Attributes. The queue has three entries.
Writing to this register adds it to the queue. The Setup Engine
starts working whenever a triangle attribute is received and
stops after it is finished processing a triangle with L = 1.
31-30 Loading Target
00 Rasterization Engine. Send bits 19-0 to the
RE. Sequential loading data will also be sent
to the RE.................................................default
01 Setup Engine. Send bits 29-0 to the SE.
Sequential loading data will also be sent to the
SE. Internally, a flag is set to prevent the SE
from decoding the data and sending it to the
RE. The SE will clear this flag when it is idle.
1x -reserved29 Null Primitive
0 Regular Primitive ...................................default
1 Null Primitive
28 Last Primitive
0 Regular Primitive ...................................default
1 Last Primitive
27-26 Culling Attribute (Setup Engine Target Only)
00 No culling...............................................default
01 Clockwise culling
10 Counter-clockwise culling
11 No culling
........................................ always reads 0
25 Reserved
24 (V2, V0) Edge Anti-Aliasing Flag ........... default = 0
23 (V1, V2) Edge Anti-Aliasing Flag .......... default = 0
22 (V1, V1) Edge Anti-Aliasing Flag .......... default = 0
21 Full Vertices Information
0 Partial Vertices Information. Two of the
vertices are from the previous triangle. Only
one vertex is to be loaded from the vertex
queue to the working registers................default
1 All vertices are new. All three working
registers are to be loaded from the vertex
queue.
20-19 Working Vertex Index
Index of the working vertex that is to be replaced.
This field is always 0 if F = 1.
........................................ always reads 0
18-3 Reserved
2
Debug Control
0 Discard triangle on overflow..................default
1 Draw triangle on overflow
1-0 Flat Color Vertex Index
Vertex index for flat color (Index of vertex whose
color is passed to the RE as the starting color)
Revision 1.3 September 8, 1999
-118
Vertex Registers
Inside the setup engine, one set of registers is provided to
store the three vertices is is currently working on and an
additional set is provided to store three pending vertices. Note
that it doesn’t always require 3 vertices to define a triangle
(depending on the Triangle Attribute Register, it may be either
1 or 3 vertices).
Vertex information includes coordinate, texture, color, and
depth. Some may be absent in a data stream. If any appear in
a vertex, they must be present in the following order: Color,
Specular Color, W, U, V, Z, X, Y. The formats are shown
below:
Vertex Register 1 - Color Value
31-24 Alpha Value
23-16 Red Value
15-8 Green Value
7-0 Blue Value
Vertex Register 2 - Specular Color Value
31-24 Fog Value
23-16 Specular Red Value
15-8 Specular Green Value
7-0 Specular Blue Value
Vertex Register 3 - W Value
31-0 Texture W Coordinate. 32-bit floating # in (0, 1.0)
Vertex Register 4 - U Value
31-0 Texture U Coordinate. 32-bit floating number
Vertex Register 5 - V Value
31-0 Texture V Coordinate. 32-bit floating number
Vertex Register 6 - Z Value
31-0 Z Coordinate. 32-bit floating number
Vertex Register 7 - X Value
31-0 X Coordinate. 32-bit floating number
Vertex Register 8 - Y Value
31-0 Y Coordinate. 32-bit floating number
Floating Point Number Format
All floating point numbers are converted by on-chip hardware
into internal fixed point integer format. All floating point
numbers are specified in IEEE 32-bit floating point number
format (shown below):
31 Sign
30-23 Exponent (excess-127 format)
22-0 Mantissa (fractional part of a number in “1.nn”
format where the integer part is always 1)
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Rasterization Engine Registers
The major responsibilities of the Rasterization Engine are:
•
•
•
•
Receive data from host: Set registers, sequential loading
of parameters.
Edge walking: Generate end points of polygon edges or
pixels on a line.
Interpolation:
Calculate values such as texture
coordinates on a polygon / line.
Perspective correction: Perform perspective correction.
In the ProMedia, the Rasterization Engine performs color
(including alpha) interpolation, texture coordinate (perspective
corrected) generation, Z coordinate interpolation, and texture
gradient (perspective corrected) calculations.
Host access to the Rasterization Engine is by sequential writes
to minimize AGP bandwidth requirements. This is not needed
for the Setup Engine to access the Rasterization Engine. In
addition, if sequential parameters were used to interface
between the Setup Engine and the Rasterization Engine, it
would incur extra cost for the Setup Engine to pack data and
would also reduce performance. Therefore, the Setup Engine
accesses working registers in the Rasterization Engine
directly. To synchronize operation, hardware must wait until
the Setup Engine becomes idle to accept data from the host to
the Rasterization Engine.
Revision 1.3 September 8, 1999
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Both Rasterization and Setup Engines share one interface to
the AGP Write Buffer. The first reason is that both
Rasterization Engine and Setup Engine use stream decoding to
receive data from the host. Once they are inside a stream,
they must act quickly to grab data to prevent other
components from taking the data. Having two stream
decoders in the graphics engine is a potential source for
problems. The second reason is that both the Rasterization
Engine and Setup Engine handle the same types of data.
Coupling them tightly makes the design easier and reduces
problems that arise from synchronization. The third reason is
for better synchronization between the two engines.
The engine interfaces to the host through both random access
registers and sequential loading. There are two random access
registers: Primitive Attribute and Primitive Type. The
Primitive Attribute register consists of most parameter
information from the Rasterization Engine’s Primitive Type
and the Setup Engine’s Triangle Attribute register.
The address space that can be used by sequential loading
parameters is from Base Address + 40h to Base Address +
FFh. Software should not use addresses outside this space for
parameters. Sequential loading must use the address in this
space starting at 0x40H in ascending order. For example,
the first address must be 40h, the next must be 44h, etc. In
order to give time to notify the other component to stop
decoding, address 40h is exclusively reserved for sequential
loading.
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + 30 – RE Primitive Attribute ............................ RW
31 Z Parameter
0 Absent ....................................................default
1 Present (Rasterization Engine calculates Z
slope)
30 Texture Parameter
0 Absent ....................................................default
1 Present (RE calculates texture info)
29 Perspective Factor Parameter
0 Absent ....................................................default
1 Present (RE performs perspective correction)
28 Color Parameter
0 Absent ....................................................default
1 Present (RE calculates Gouraud color
(RGBA))
27 Specular Color Parameter
0 Absent ....................................................default
1 Present (RE calculates specular color)
26 Fog Parameter
0 Absent ....................................................default
1 Present (RE calculates fog)
25 Step Mode
0 Disable ...................................................default
1 Enable (RE will process the next primitive
only when it finishes the current primitive. No
parallelism exists between primitives)
........................................ always reads 0
24-20 Reserved
19-15 LOD Adjust .............................................. default = 0
3.2 signed # to be added to calculate the LOD value
........................................ always reads 0
14-7 Reserved
6
5
4
3
2
1
0
Z Normalization (Setup Engine Only)
0 Disable................................................... default
1 Enable
Flat Mode (applies to diffuse color, alpha, specular
color, and fog)
0 Smooth color or no color ....................... default
1 Flat color. RE forces deltas to 0.
Full Vertex Info
0 Disable................................................... default
1 Enable. Indicates that all vertex data are
needed for the triangle. Software still needs to
set bits 31-25. However in this case, the data
order in a vertex is: X, Y, Z, W, RGBA,
SrgbF, U, V. Even though the vertex actually
contains all the data, software doesn’t
necessarily set this bit. When this bit is not
set, hardware decodes vertex data as described
in the Vertex Register descriptions.
Sub-Pixel Precision (Rasterization Engine Only)
0 Disable................................................... default
1 Enable
Anti-Aliasing (RE Only)
0 Disable (walk at pixel precision) ........... default
1 Enable (walk at sub-pixel precision)
Auto Direction for Scan Line Ends (RE Only)
0 Disable................................................... default
1 Enable. Bits 31-2 must be 0. Scan order is
passed to the Pixel Engine based on the
comparison result of two end points instead of
the bit in the Primitive Type register. Software
should only use this bit for 2D polygons with
Bresenham edge walking.
Bresenham Edge Walking (RE Only)
0 Use DDA to walk through edges ........... default
1 Use Bresenham algorithm to walk through
edges
This register is decoded by the Setup Engine and passed to the
Rasterization Engine by the Setup Engine. This register and
its equivalent part in the Rasterization Engine are “partially”
pipelined in the sense that there are only two levels of pipe for
this register in both engines while there are many levels for
other data. The two levels are the decoding level and the
execution level. Both the Rasterization Engine and the Setup
Engine use this register to decide what kind of operation to
perform and what kind of data stream to expect. It must be set
before any parameter can be loaded.
Revision 1.3 September 8, 1999
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + 3C – RE Primitive Type ................................. WO
Writing to this register signals the Graphics Engine to begin
sequential loading, but doesn’t cause anything to be drawn..
The engine will interpret the contents of this register and
decide the amount and types of parameters to expect.
31-30 Loading Target
00 Rasterization Engine. Send bits 19-0 to the
RE. Sequential loading data will also be sent
to the RE.................................................default
01 Setup Engine. Send bits 29-0 to the SE.
Sequential loading data will also be sent to the
SE. Internally, a flag is set to prevent the SE
from decoding the data and sending it to the
RE. The SE will clear this flag when it is idle.
1x -reserved29 Null Primitive
0 Regular Primitive ...................................default
1 Null Primitive
28 Last Primitive
0 Regular Primitive ...................................default
1 Last Primitive
27-26 Operation Code (RE Target Only)
00 Line .....................................................default
01 Polygon
1x -reserved25 Major Edge Parameter
0 Parameter is Absent (parameter stream doesn’t
include values for the iterators) ..............default
1 Parameter is Present (parameter stream also
includes values for the iterators)
24 Major Edge Anti-Aliasing
0 Don’t anti-alias major edge ....................default
1 Anti-alias major edge (effective only if E = 1)
23 Minor Edge Parameter
0 Absent ....................................................default
1 Present
22 Minor Edge Anti-Aliasing
0 Don’t anti-alias minor edge ....................default
1 Anti-alias minor edge (effective only if M = 1)
21 Scan Direction
0 Positive (Major edge = left edge)...........default
1 Negative (Major edge = right edge)
........................................ always reads 0
20-16 Reserved
15-0 End Coordinate ....................................... default -= 0
End coordinate of the primitive (inclusive). 12.4
signed integer.
Revision 1.3 September 8, 1999
-121
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Bresenham Edge Parameters
Bresenham Edge parameters describe an edge of a primitive or
a line.
DDA Edge Parameters
DDA Edge parameters describe an edge of a primitive or a
line.
DoubleWord 0 – Start Coordinates
31-16 Start YS1
Starting coordinate of the line in the Y direction
(signed 12.4 number). The fractional part must be 0.
This parameter is ignored in minor edges.
15-0 Start XS1
Starting coordinate of the line in the X direction
(signed 12.4 number). The fractional part must be 0.
DoubleWord 0 – Start Coordinates
31-16 Start YS1
Starting coordinate of the line in the Y direction
(signed 12.4 number). The fractional part must be 0.
This parameter is ignored in minor edges.
15-0 Start XS1
Starting coordinate of the line in the X direction
(signed 12.4 number). The fractional part must be 0.
DoubleWord 1 – Drawing Direction / Bresenham Constant
31 YS Drawing Direction
0 Positive
1 Negative
30 XS Drawing Direction
0 Positive
1 Negative
29 Swap
0 Normal (X / Y not swapped)
1 X / Y swapped
28-16 Bresenham (or Modified) Constant
................................................... ignored
15-13 Reserved
12-0 Bresenham (or Modified) Constant
DoubleWord 1 – Drawing Direction / Edge Slope
31 YS Drawing Direction
0 Positive
1 Negative
30 XS Drawing Direction
0 Positive
1 Negative
29 Swap
0 Normal (X / Y not swapped)
1 X / Y swapped
................................................... ignored
28-26 Reserved
25-0 Edge Slope
12.14 signed number
DoubleWord 2 – Error Term / Strip Length
........................... must be written as zero
31-29 Reserved
28-16 Initial Error Term
........................... must be written as zero
15-12 Reserved
11-0 Strip Length
Strip length of modified Bresenham line.
When a DDA edge is used as a polygon boundary, the
fractional bits should round up to the next integer.
Interpolation values should be adjusted accordingly. DDA
edge walking shares the same logic as Bresenham edge
walking by using an error advance method. In DDA walking,
fractional bits should be rounded up to the next integer.
Rounding up is performed by changing drawing convention
according to whether the fractional parts are 0 as follows:
•
Left fractional is 0: Left inclusive.
•
Left fractional is not 0: Left exclusive.
•
Right fractional is 0: Right exclusive.
•
Right fractional is not 0: Right inclusive.
Because the error advance method is used for DDA walking,
the fractional part is always one step ahead of the coordinate.
For the starting point of a line, the fractional part is assumed
to be 0.
Revision 1.3 September 8, 1999
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Color Parameters
Color parameters are used for Gouraud shading. They consist
of starting values, incremental along the X and Y axis. In flat
color mode, this parameter only has the starting value.
DoubleWord 0 – Initial Values
31-24 Initial Alpha Value
Initial Alpha value on main edge (left edge of
trapezoid or long edge of triangle). Unsigned integer.
23-16 Initial Red Value
Initial Red value on main edge (left edge of trapezoid
or long edge of triangle). Unsigned integer.
15-8 Initial Green Value
Initial Green value on main edge (left edge of
trapezoid or long edge of triangle). Unsigned integer.
7-0 Initial Blue Value
Initial Blue value on main edge (left edge of
trapezoid or long edge of triangle). Unsigned integer.
DoubleWord 1 – X-Axis Blue Gradient
31-0 X-Axis Blue Gradient
Gradient of Blue along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 2 – Y-Axis Blue Gradient
31-0 Y-Axis Blue Gradient
Gradient of Blue along the Y axis over the primitive
surface. Signed 20.12 number.
DoubleWord 3 – X-Axis Green Gradient
31-0 X-Axis Green Gradient
Gradient of Green along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 4 – Y-Axis Green Gradient
31-0 Y-Axis Green Gradient
Gradient of Green along the Y axis over the primitive
surface. Signed 20.12 number.
Z Value Parameters
To the Rasterization Engine, the Z value is always a 25.8
signed integer internally regardless of Z buffer depth. It
always passes a 24-bit unsigned integer to the Pixel Engine. It
is the Pixel Engine’s responsibility to scale Z to the depth of
the Z buffer. Z parameters are used to calculate depth
information. Z values consist of starting values, incremental
along the X and Y axis.
DoubleWord 0 – Initial Z Value
31-0 Initial Z Value
Initial Z value on main edge (left edge of trapezoid or
long edge of triangle). Signed 25.7 integer.
DoubleWord 1 – X-Axis Z Gradient
31-0 X-Axis Z Gradient
Gradient of Z along the X axis over the primitive
surface. Signed 25.7 number.
DoubleWord 2 – Y-Axis Z Gradient
31-0 Y-Axis Z Gradient
Gradient of Z along the Y axis over the primitive
surface. Signed 25.7 number.
DoubleWord 3 – Minimum Z Threshold
................................................... ignored
31-24 Reserved
23-0 Minimum Z Threshold
Minimum of Z threshold. Unsigned 24-bit integer.
DoubleWord 4 – Maximum Z Threshold
................................................... ignored
31-24 Reserved
23-0 Maximum Z Threshold
Maximum of Z threshold. Unsigned 24-bit integer.
DoubleWord 5 – X-Axis Red Gradient
31-0 X-Axis Red Gradient
Gradient of Red along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 6 – Y-Axis Red Gradient
31-0 Y-Axis Red Gradient
Gradient of Red along the Y axis over the primitive
surface. Signed 20.12 number.
DoubleWord 7 – X-Axis Alpha Gradient
31-0 X-Axis Alpha Gradient
Gradient of Alpha along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 8 – Y-Axis Alpha Gradient
31-0 Y-Axis Alpha Gradient
Gradient of Alpha along the Y axis over the primitive
surface. Signed 20.12 number.
Revision 1.3 September 8, 1999
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3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Texture Coordinate Parameters
Texture parameters are used for texture mapping. They
consist of starting values, incremental along the X and Y axis.
DoubleWord 0 – Initial U Value
31-0 Initial U Value
Initial U value on main edge (left edge of trapezoid or
long edge of triangle). Signed 16.16 integer.
DoubleWord 1 – Initial U Value
31-0 Initial U Value
Initial U value on main edge (left edge of trapezoid or
long edge of triangle). Signed 16.16 integer.
DoubleWord 2 – X-Axis U Gradient
31-0 X-Axis U Gradient
Gradient of U along the X axis over the primitive
surface. Signed 16.16 number.
DoubleWord 3 – Y-Axis U Gradient
31-0 Y-Axis U Gradient
Gradient of U along the Y axis over the primitive
surface. Signed 16.16 number.
Perspective Factor Parameters
Perspective factor parameters are used for perspective
corrected texture mapping. They consist of W starting values
incremental along the X and Y axis.
DoubleWord 0 – Initial W Value
31-0 Initial W Value
Initial W value on main edge (left edge of trapezoid
or long edge of triangle). Signed 4.28 integer.
DoubleWord 1 – X-Axis W Gradient
31-0 X-Axis W Gradient
Gradient of W along the X axis over the primitive
surface. Signed 4.28 number.
DoubleWord 2 – Y-Axis W Gradient
31-0 Y-Axis W Gradient
Gradient of W along the Y axis over the primitive
surface. Signed 4.28 number.
DoubleWord 4 – X-Axis V Gradient
31-0 X-Axis V Gradient
Gradient of V along the X axis over the primitive
surface. Signed 16.16 number.
DoubleWord 5 – Y-Axis V Gradient
31-0 Y-Axis V Gradient
Gradient of V along the Y axis over the primitive
surface. Signed 16.16 number.
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Specular / Fog Start Value
The specular / fog start value is used for specular shading or
fogging.
DoubleWord 0 – Start Value
31-24 Initial Fog Value
Initial Fog value on main edge (left edge of trapezoid
or long edge of triangle). Unsigned integer.
23-16 Initial Red Value
Initial Red value on main edge (left edge of trapezoid
or long edge of triangle). Unsigned integer.
15-8 Initial Green Value
Initial Green value on main edge (left edge of
trapezoid or long edge of triangle). Unsigned integer.
7-0 Initial Blue Value
Initial Blue value on main edge (left edge of
trapezoid or long edge of triangle). Unsigned integer.
Fog Parameters
Fog parameters are used for fogging. These parameters are
not present in flat color mode and consist of starting values
incremental along the X and Y axis.
DoubleWord 0 – X-Axis Fog Gradient
31-0 X-Axis Fog Gradient
Gradient of Fog along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 1 – Y-Axis Fog Gradient
31-0 Y-Axis Fog Gradient
Gradient of Fog along the Y axis over the primitive
surface. Signed 20.12 number.
Specular Parameters
Specular parameters are used for specular shading. These
parameters are not present in flat color mode and consist of
starting values incremental along the main direction ((dx, dy) =
(M1, 1)), and incremental along the X axis.
DoubleWord 0 – X-Axis Blue Gradient
31-0 X-Axis Blue Gradient
Gradient of Blue along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 1 – Y-Axis Blue Gradient
31-0 Y-Axis Blue Gradient
Gradient of Blue along the Y axis over the primitive
surface. Signed 20.12 number.
DoubleWord 2 – X-Axis Green Gradient
31-0 X-Axis Green Gradient
Gradient of Green along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 3 – Y-Axis Green Gradient
31-0 Y-Axis Green Gradient
Gradient of Green along the Y axis over the primitive
surface. Signed 20.12 number.
DoubleWord 4 – X-Axis Red Gradient
31-0 X-Axis Red Gradient
Gradient of Red along the X axis over the primitive
surface. Signed 20.12 number.
DoubleWord 5 – Y-Axis Red Gradient
31-0 Y-Axis Red Gradient
Gradient of Red along the Y axis over the primitive
surface. Signed 20.12 number.
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Pixel Engine Registers
Data from the Host
The major responsibilities of the Pixel Engine are to perform
per-pixel operations and to control data flow and its sequence.
The Pixel Engine can accept data from the host through either
the 32-bit data port register at 9Ch or data in the 1xxxh
address space. Software passes only enough DWORDs to
hardware.
Software doesn’t pack data to 64-bit
boundaries. It only packs to 32-bit boundaries. For bitblts,
packing is done per-scanline. I.e., for every scanline, the host
will send just enough DWORDs to the engine. For text,
packing is done per-command. I.e., the scanline may be
broken inside a DWORD. For a string of texts, the number of
DWORDs of data passed to the Graphic Engine can be odd
numbers except for the last character. For the last character,
software should pass either an even number of DWORDs (by
padding a garbage DWORD as necessary) or by setting a
drawing environment register after all data is sent.
The Pixel engine interfaces to the Rasterization Engine and
the host to accept data. It also interfaces to the Memory
Interface to access video memory. Inside the Pixel Engine,
there are several blocks: the Span Engine, the Data Path, and
the Texture Engine. Operation of the Data Path and the
Texture Engine are under control of the Span Engine. The
Memory Interface accepts memory access requests from the
Pixel Engine, translates the address into a linear address, and
executes the requests.
AGP
Span
A
Rasterization
Data Path
D
Texture Engine
A
D
Memory Interface
The 0 - FFh “Engine” register address space is partitioned
into six sections:
0 - 0Fh
10 - 2Fh
30 - 3Fh
44 - 9Fh
A0 – AFh
B0 – BFh
C0 – FFh
Span Engine
VGA core
Unified Rasterization and Setup Engines
Pixel Engine
Texture Engine
Command List Control Unit
Memory Interface
Addresses 40h - FFh are also used for sequential loading
overlapping with other registers in this space. Addresses
10000 - 1FFFFh are used as a data port area.
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GEbase + 44 – Drawing Command .................................. RW
Writing to the Drawing Command register starts a drawing
operation. When this register is set, the drawing environment
registers and memory interface registers are locked in. Any
change to these registers will not affect this drawing
operation. Furthermore, the Pixel Engine will not accept any
data from the host or from the Rasterization Engine without a
drawing command. After a drawing command is issued, the
Pixel Engine will selectively accept data from the host or
Rasterization Engine depending on the command.
Specifically, the Pixel Engine only accepts data from the host
if the command is text or blt and the BS field indicates the
source is from the host. The Pixel Engine only accepts data
(scanlines, Z, color, etc.) from the Rasterization Engine if the
command is line or polygon.
31-28 Operation Code
0000 Null Command .......................................default
0001 -reserved0010 Line
0011 -reserved01xx -reserved1000 Bit-Blt (see note below)
1001 Text (see note below)
1010 (See BitBlt)
1011 Trapezoid / Polygon
1100 (See Bit Blt)
1101 (See Text)
1110 Trapezoid / Polygon
1111 -reservedNote: for Text and BitBlt opcodes, bit 29 indicates
whether the PE can accept data from the host
while bit-30 indicates whether the PE can
accept data from the RE.
27 Line Style
0 No style, solid line, or other operation (blt,
polygon, text)
1 Style line
26 Z Operations
0 Disable Z operations (must be 0 for text, blt)
1 Enable Z operations
25 Alpha Test
0 Disable (must be 0 for text)
1 Enable
24 Texture Function
0 Disable (must be 0 for blt, text)
1 Enable
23 Alpha Blending
0 Disable (must be 0 for text)
1 Enable
22 Specular Color
0 Disable (must be 0 for blt, text)
1 Enable
21 Fog
0 Disable (must be 0 for blt, text)
1 Enable
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20
Source Color Expansion
0 Disable
1 Enable (bits 26-21 must be 0)
19 Source Color
0 Transparent (applies to mono source and
constant color line)
1 Opaque (should be enabled for any operation
with a “solid Source”, such as Gouraud
shading, constant color fill, color to screen blt,
texture mapping, etc.)
18-17 Source Surface ID
16-15 Destination Surface ID
14-12 Source Offset
Mono source pixel offset. Bit-19 must be 1.
11 Double Specular Color
0 Disable
1 Enable. Specular color (RGB) is doubled
before being added to diffuse color.
10 Texture Transparency
0 Disable texture color key
1 Enable texture color key
9
Lit-Texture
0 Disable
1 Enable
8
Dither
0 Disable
1 Enable. Use 4x4 dither matrix (including fog
and alpha)
7
Source Color Key
0 Disable
1 Enable (Key is FG)
6
Destination Color Key
0 Disable
1 Enable
5
Bit Mask
0 Disable
1 Enable
4
ROP
0 Disable
1 Enable
3-2 Blt Source or Constant Color Line or Polygon
00 Source from host (bits 26-20 must be 0 for blt)
01 Source from frame buffer
10 Source is constant (FG). Includes constand
line and constant polygon.
11 Block write fill
This field must be set to 00 for text / line / polygon.
1
Blt Direction (BLT Only)
0 Positive direction in X and Y
1 Negative direction in X and Y
Must be set to 0 for polygons, lines, and text.
0
Clipping
0 Disable
1 Enable
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + 48 – Raster Operation (ROP) ......................... RW
........................................ always reads 0
31-8 Reserved
7-0 ROP3 Code
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GEbase + 4C – Z Function ............................................... RW
31 Z-Bias
0 Disable
1 Enable
........................................always reads 0
30-17 Reserved
16-7 Z-Bias Value
6
Test Alpha
0 Disable
1 Enable
5
Z-Buffer Write
0 Disable
1 Enable
........................................always reads 0
4-3 Reserved
2-0 Z-Buffer Compare
000 Compare False. Z and RGB values will not be
written to memory.
001 Compare Less Than. Z and RGB values will
be written to memory if the current Z value is
less than the Z value in memory.
010 Compare Equal. Z and RGB values will be
written to memory if the current Z value is
equal to the Z value in memory.
011 Compare Less Than or Equal. Z and RGB
values will be written to memory if the current
Z value is less than the Z value in memory.
100 Compare Greater Than. Z and RGB values
will be written to memory if the current Z
value is greater than the Z value in memory.
101 Compare Not Equal. Z and RGB values will
be written to memory if the current Z value is
not equal to the Z value in memory.
110 Compare Greater Than or Equal. Z and RGB
values will be written to memory if the current
Z value is greater than or equal to the Z value
in memory.
111 Compare True. Z and RGB values will be
written to memory.
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + 50 – Texture Function...................................... RW
31-22 Maximum U
21-12 Minimum U
........................................ always reads 0
11-5 Reserved
4
Mask
0 Disable
1 Enable
3-2 Texture Alpha
00 Texel alpha
01 Source alpha
10 Modulated alpha: texel alpha x source alpha
11 -reserved1-0 Texture Color
00 Texel color
01 Source color
10 Modulated color: texel color x source color
11 -reserved-
GEbase + 54 – Clipping Window 0 .................................. RW
........................................ always reads 0
31-28 Reserved
27-16 Clipping Window Top ............................. default = 0
........................................ always reads 0
15-12 Reserved
11-0 Clipping Window Left ............................ default = 0
GEbase + 60 – Color 0 (Foreground) .............................. RW
31-0 Foreground Color Value
GEbase + 64 – Color 1 (Background) ............................. RW
31-0 Background Color Value
Note: In 16- and 8- bit modes, the color must be duplicated to
fill an entire 32-bit word. 32-bit color is in ARGB format
(i.e., Alpha, Red, Green, and Blue in bytes 3-0 respectively)
and 16-bit color is in RGB 565 format (5 bits of Red, 6 bits of
Green, and 5 bits of Blue).
GEbase + 68 – Color Key ................................................. RW
........................................always reads 0
31-26 Reserved
25 Destination Polarity
0 Draw on Equal
1
24 Source Polarity
0 Draw on Equal
1
23-0 Destination Color Key Color
Unlike foreground and background, the color is not
replicated in 16-bit or 8-bit modes.
GEbase + 58 – Clipping Window 1 .................................. RW
........................................ always reads 0
31-28 Reserved
27-16 Clipping Window Bottom........................ default = 0
........................................ always reads 0
15-12 Reserved
11-0 Clipping Window Right .......................... default = 0
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GEbase + 6C – Pattern and Style ..................................... RW
31 Pattern Color Expansion
0 Disable ...................................................default
1 Enable
30 Pattern Transparency
0 Opaque ...................................................default
1 Transparent
29 Pattern Size
0 8 x 8 pixels .............................................default
1 32 x 32 pixels (mono only)
28 Pattern Register Segment
0 Low Segment..........................................default
1 High Segment
Note: The pattern cache is divided into two segments
for double pattern purposes. This bit serves two
purposes: First as the starting segment for loading a
pattern into the pattern cache, the corresponding
address is latched into an internal register which will
automatically increase by one when data is loaded.
Second as the segment base of the current pattern
when applying a pattern.
........................................ always reads 0
27-24 Reserved
23-16 Pattern Style Step
The # of pixels each mask bit should be mapped to:
00 1 Pixel per mask bit................................default
01 2 pixels per mask bit
02 3 pixels per mask bit
… …
FF 256 pixels per mask bit
15-0 Pattern Style Mask
Determines the line drawing style (e.g., dotted line).
Bit-0 maps to the first pixel. Writing to the low byte
of ths register (GEbase + 6C) causes the internal style
count to be reset to 0. When 3D operations are
enabled (smooth shading, texture, Z), style line must
be transparent and style applies to color as well as Z.
GEbase + 74 – Pattern Foreground Color ...................... RW
31-0 Foreground Color Value..........................default = 0
GEbase + 78 – Pattern Background Color ..................... RW
31-0 Background Color Value .........................default = 0
Note: In 16- and 8- bit modes, the color must be duplicated to
fill an entire 32-bit word. 32-bit color is in ARGB format
(i.e., Alpha, Red, Green, and Blue in bytes 3-0 respectively)
and 16-bit color is in RGB 565 format (5 bits of Red, 6 bits of
Green, and 5 bits of Blue).
GEbase + 70 – Pattern Color............................................ RW
31-0 Pattern Color Value
Must follow the command. The pattern data could be
repeated up to 64 times to fill out the pattern register
file.
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GEbase + 7C – Alpha ........................................................ RW
........................................ always reads 0
31-16 Reserved
15-8 Source Constant Alpha
7-0 Destination Constant Alpha
GEbase + 84 – Bit Mask.................................................... RW
31-0 Bit Mask
One bits indicate that the corresponding color bit will
not be written to the frame buffer.
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GEbase + 80 – Alpha Function ........................................ RW
........................................always reads 0
31-24 Reserved
23 Alpha Write
0 Disable................................................... default
1 Enable. Draw each pixel with a blended alpha
value if alpha blending is enabled. Otherwise
draw with source alpha (the upper byte of the
Foreground Color register if not available).
This bit should be set in 8-bit and 16-bit color modes.
22 Constant Source Alpha
0 Disable .................................................. default
1 Enable
21 Constant Destination Alpha
0 Disable .................................................. default
1 Enable
20 Result Alpha
0 The result of blending ........................... default
1 Source alpha
19-16 Alpha Test Function
0000 Never accept the pixel
0001 Accept if alpha < reference alpha
0010 Accept if alpha == reference alpha
0011 Accept if alpha <= reference alpha
0100 Accept if alpha > reference alpha
0101 Accept if alpha != reference alpha
0110 Accept if alpha >= reference alpha
0111 Always accept the pixel
1xxx -reserved15-8 Reference Alpha Value
7-4 Destination Blending Factor
0000 (0,0,0,0)
0001 (1,1,1,1)
0010 (RS,GS,BS,AS)
0011 (1,1,1,1) - (RS,GS,BS,AS)
0100 (AS,AS,AS,AS)
0101 (1,1,1,1) – (AS,AS,AS,AS)
0110 (AD,AD,AD,AD)
0111 (1,1,1,1) – (AD,AD,AD,AD)
1xxx -reserved3-0 Source Blending Factor
0000 (0,0,0,0)
0001 (1,1,1,1)
001x -reserved0100 (AS,AS,AS,AS)
0101 (1,1,1,1) – (AS,AS,AS,AS)
0110 (AD,AD,AD,AD)
0111 (1,1,1,1) – (AD,AD,AD,AD)
1000 (RD,GD,BD,AD)
1001 (1,1,1,1) - (RD,GD,BD,AD)
1010 (F,F,F,1); F = min (AS, 1-AD)
1011 -reserved11xx -reserved-
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Texture Engine Registers
The texture Engine handles texture access and filtering. It is
controlled by the Span Engine. It accepts texture coordinates
from the Rasterization Engine, generates and passes addresses
to the Memory Interface, accepts raw texel data from the
Memory Interface, does filtering, and passes the results to the
Data Path.
GEbase + A0 – Texture Control ....................................... RW
Textures are aligned to 64-bit boundaries on a scanline basis.
31
Texture Access Control
0 Disable (use cache)
1 Enable (bypass cache)
30 Filtering Control
0 Filter with color key. Treat alpha value for
keyed texels as 0
1 Downgrade filtering function based on
fractional bits of UV and key test result. Set
alpha to 0 for keyed texels.
29-28 Texture U Boundary Checking Function
00 Texture U wraparound
01 Texture U mirroring
10 Texture U clamping
11 -reserved27-26 Texture V Boundary
00 Texture V wraparound
01 Texture V mirroring
10 Texture V clamping
11 -reserved25 Texture in System Memory
0 Texture is stored in graphics memory
1 Texture is stored in system memory
24 Reserved (must be 0)
23 MipMap
0 Disable
1 Enable
22 Intra-map Filter
0 Disable
1 Enable (do filtering inside a LOD level)
21 Inter-map Filter
0 Disable
1 Enable (do filtering inside a LOD level)
M must be 1.
20 Magnify Filter (when LOD < 0)
0 Point Sample
1 Bi-linear
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19
Tiling
0 Texture is not tiled
1 Texture is tiled.
Tile size is determined by texel depth:
Texel Depth (bpp) Tile Size
1
16 x 16
2
8 x 16
4
8x8
8
4x8
16
4x4
32
2x4
Inside each tile, texels are organized into 2x2
subtiles in row major
18 Texture Color Key
0 Disable
1 Enable
17 Texture Anisotropy
0 Disable
1 Enable
16-15 Palette Data Format
00 565 RGB
01 1555 ARGB
10 4444 ARGB
11 -reserved14-12 Texel Depth
000 1-bpp palettized
001 2-bpp palettized
010 4-bpp palettized
011 8-bpp palettized
100 16-bpp 565 RGB
101 16-bpp 1555 ARGB
110 16-bpp 4444 ARGB
111 32-bpp ARGB
11-8 Texture Map Levels (TML) (Range 0-8)
The number of maps in the MipMap (0 = 1 map)
7-4 Y-Axis Texture Memory Size (TRY) (Range 0-8)
This field determines the number of lsb’s (2**TRY)
of parameter V to be used in the Y axis. Any bit
higher than this will be ignored (wraparound).
3-0 X-Axis Texture Memory Size (TRX) (Range 0-8)
This field determines the number of lsb’s (2**TRX)
of parameter U to be used in the X axis. Any bit
higher than this will be ignored (wraparound).
Note: For MipMap textures, TRX/TRY is the size of the
original texture (1:1 map)
3D Graphics Engine Registers
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
GEbase + A4 – Texture Color .......................................... RW
31-24 Alpha
Constant alpha value when there is no alpha in the
texture format
23-0 Texture Color Key
Texture transparency color (888 RGB)
GEbase + A8 – Texture Palette Data .............................. WO
31-16 Texel n+1
15-0 Texel n
An internal counter is used in loading the texture palette.
Writing to the Texture register (GEbase+A0) resets the
counter to 0. Writing to the Texture Palette Data register
writes the data to the place pointed to by the counter then
increments the counter by 1. Each write writes two entries into
the palette.
Texture Filtering
Texture data read back from the Memory Interface first goes
through palette translation if the texture is palettized. The
texture is then converted into common internal 8888 ARGB
format. If the texture doesn’t have alpha data, then a constant
alpha value is used. If the texture color key is enabled and the
texture color matches the key, set alpha to 0. Bi-linear or trilinear filtering is then performed on RGB and alpha. If the
color key is enabled and the result alpha is 0, the
corresponding pixel should be discarded. This is done by
attaching a validity bit with texture data passed from the
Texture Engine to the Data Path. It should be noted that
filtering depends on the LOD value. When LOD < 0, a
different filter may be applied. In bi-linear filtering, if the
texel nearest to the texture coordinate is masked by the color
key, then the texel is considered as masked. Otherwise, the
texel is considered not masked.
GEbase + AC – Texture Boundary .................................. RW
31-22 Maximum V
21-12 Minimum V
........................................ always reads 0
11-8 Reserved
7
Reverse Texture Format
0 Disable
1 Enable
6
Texture Cache
0 Disable
1 Enable
5
Texture Map Shift
0 Disable
1 Enable
4-3 Compressed Texture Format
00 No compression
01 DXT1 format
10 DXT2 format
11 -reserved2-0 Dither Shift
000 Disable LOD dithering
001 100% LOD dithering
010 80% LOD dithering
011 60% LOD dithering
100 40% LOD dithering
101 20% LOD dithering
11x -reserved-
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Memory Interface Registers
The registers in this group include stride and buffer base
address registers for frame buffer control. There are three
base addresses: source base address (added to blt source),
destination base address (added to color destination), and Z
base address (added to Z addresses).
There are 9 texture base registers for up to 9 levels of
MipMaps: level 0 (1:1 map) up to level 8 (smallest). The
texture may be in the frame buffer or in system memory.
GEbase + B8 – Destination Stride / Buffer Base 0 .......... RW
GEbase + E0 – Texture Base MipMap Level 1 .............. RW
GEbase + BC – Destination Stride / Buffer Base 1 ......... RW
GEbase + E4 – Texture Base MipMap Level 2 .............. RW
GEbase + C0 – Destination Stride / Buffer Base 2 ......... RW
GEbase + E8 – Texture Base MipMap Level 3 .............. RW
GEbase + C4 – Destination Stride / Buffer Base 3 ......... RW
GEbase + EC – Texture Base MipMap Level 4 ............. RW
GEbase + C8 – Source Stride / Buffer Base 0 ................. RW
GEbase + F0 – Texture Base MipMap Level 5 .............. RW
GEbase + CC – Source Stride / Buffer Base 1 ................ RW
GEbase + F4 – Texture Base MipMap Level 6 .............. RW
GEbase + D0 – Source Stride / Buffer Base 2 ................. RW
GEbase + F8 – Texture Base MipMap Level 7 .............. RW
GEbase + D4 – Source Stride / Buffer Base 3 ................. RW
All eight of the above registers have the same bit definitions:
GEbase+FC – Texture Base MipMap Level 8 (Smallest)RW
All nine of the above registers have the same bit definitions:
GEbase+DC – Texture Base MipMap Level 0 (1:1 Map)RW
31-0 Texture Base Address (in bytes)
Base addresses always start on QWORD boundaries
so bits 2-0 are always 0.
31-29 Bits Per Pixel
000 8 bits per pixel
001 16 bits per pixel (565 format)
010 32 bits per pixel
011 -reserved100 -reserved101 16 bits per pixel (555 format)
11x -reserved28-20 Stride (pixels divided by 8)
19-0 Buffer Base Address (in quadwords)
Data Port Area
GEbase + 10000-1FFFFh – Data Port Area ................... RW
GEbase + D8 – Z Depth / Z Buffer Base .......................... RW
31-30 Z Depth
00 16 bits
01 24 bits (32 bits are allocated in the frame
buffer with the MSB not used)
1x -reserved........................................ always reads 0
29 Reserved
28-20 Z Stride
19-0 Z Buffer Base Address (in quadwords)
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:H &&RRQQHFW
7HFKQRORJLHV ,QF
FUNCTIONAL DESCRIPTIONS
System Configuration
The Apollo ProMedia has several modes that are required to
be determined at reset time. This includes DFP monitor modes
for selecting the correct display device and test modes to assist
in board debug and trouble-shooting for manufacturing.
DFP Interface Configuration
The Apollo ProMedia uses the MA[6} pin in conjunction with
the RESET# pine to select if the DFP interface is ON or OFF.
This is primarily used for test purposes.
LCD On/Off Mode
LCD OFF
LCD ON
MA[6]
0
1
The LCD type is selected by MA[5-3]:
LCD Type
TFT
TFT
TFT
TFT
DSTN
DSTN
DSTN
DSTN
LCD Resolution
1024 x 768 x 18-bit
1280 x 1024 x 18-bit
800 x 600 x 18-bit
1024 x 600 x 18-bit
1024 x 768 x 16-bit
1024 x 600 x 24-bit
800 x 600 x 16-bit
1024 x 768 x 24-bit
Revision 1.3 September 8, 1999
MA[5-3]
000
001
010
011
100
101
110
111
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Functional Descriptions
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
Graphics Controller Power Management
Power Management Registers
The ProMedia Graphics Controller power mangement feature
set complies with AGP and PCI power management
requirements.
Power management control for the ProMedia Graphics
Controller is provided by extended registers SR24 (Power
Management Control), GR20 (Standby Timer Control), GR21
(Power Management Control 1), GR22 (Power Management
Control 2), GR23 (Power Status), GR24 (Soft Power Control),
GR25 (Power Control Select), GR26 (DPMS Control), GR2728 (GPIO Control), GR2A (Suspend Pin Timer), GR2C
(Miscellaneous Pin Control), GR2F (Miscellaneous Internal
Control), and Graphics Controller PCI Configuration Indices
90-97 (PCI Power Management Registers 1 and 2).
Power Management States
Power management states (D0-D3) for both ACPI and PCI
Bus Power Management (PCI PM) refer to the same states
described in the Device Class PM Reference Specification for
Display Devices, which are equivalent to the VESA™ DPMS
power states. System software should access the ProMedia’s
configuration registers to perform PCI PM state transitions.
Table 12. PCI Power Management States
PCI PM
State
State 0
(D0)
State 1
(D1)
State 2
(D2)
State 3
(D3)
Desktop
Notebook
Graphics
Graphics
DPMS State 0
Proprietary State 0
Fully On
Fully On
DPMS State 1
Proprietary State 1
Standby
Standby
(Hsync Off)
(VCLK Off)
DPMS State 2
Proprietary State 2
Suspend
Suspend
(Vsync Off)
(MCLK/VCLK Both Off)
DPMS State 3
Same as State 2
Off
(H/Vsync Both Off)
Power Management Clock Control
If the system “South Bridge” sends a request to the ProMedia
to power down the memory controller, the ProMedia first uses
CLKRUN# (the same signal appearing external to the
ProMedia) to check to see if the internal graphics controller
needs to access main memory. The graphics controller logic
will detect CLKRUN# high for 2 or 3 PCICLK’s and check if
there are any:
Internal buffers not emptied
PCI Master or AGP Master actions pending
If either condition exists, the graphics controller logic will
assert CLKRUN# low for 2 PCICLK’s to signal the clock
generator to keep PCICLK running.
PME# is not implemented since there are no wake-up
conditions.
Revision 1.3 September 8, 1999
-136-
Functional Descriptions
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings
Table 13. Absolute Maximum Ratings
Symbol
Parameter
TA
Min
Ambient operating temperature
Max
Unit
Notes
70
oC
1
-55
125
oC
1
0
TS
Storage temperature
VIN
Input voltage
-0.5
VRAIL + 10%
Volts
1, 2
Output voltage
-0.5
VRAIL + 10%
Volts
1, 2
VOUT
Note 1: Stress above the conditions listed may cause permanent damage to the device. Functional operation of
this device should be restricted to the conditions described under operating conditions.
Note 2. VRAIL is defined as the VCC level of the respective rail. The CPU interface can be 3.3V or 2.5V.
Memory can be 3.3V only. PCI can be 3.3V or 5.0V. Video can be 3.3V or 5.0V. Flat Panel can be 3.3V only.
DC Characteristics
TA = 0-70oC, VRAIL = VCC +/- 5%, VCORE = 2.5V +/- 5%, GND=0V
Table 14. DC Characteristics
Symbol
Parameter
Min
Max
Unit
VIL
Input Low Voltage
-0.50
0.8
V
Condition
VIH
Input High Voltage
2.0
VCC+0.5
V
VOL
Output Low Voltage
-
0.55
V
IOL=4.0mA
VOH
Output High Voltage
2.4
-
V
IOH=-1.0mA
IIL
Input Leakage Current
-
+/-10
uA
0<VIN<VCC
IOZ
Tristate Leakage Current
-
+/-20
uA
0.55<VOUT<VCC
ICC
Power Supply Current
-
mA
AC Timing Specifications
AC timing specifications provided are based on external zero-pf capacitance load. Min/max cases are based on the following table:
Table 15. AC Timing Min / Max Conditions
Parameter
Min
Max
Unit
5.0V Power
4.75
5.25
Volts
3.3V Power
3.135
3.465
Volts
2.5V Power
2.375
2.625
Temperature
0
70
Volts
oC
Drive strength for selected output pins is programmable. See Rx6D for details.
Revision 1.3 September 8, 1999
-137-
Electrical Specifications
VT8601 Apollo ProMedia
:H &&RRQQHFW
7HFKQRORJLHV ,QF
MECHANICAL SPECIFICATIONS
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Revision 1.3 September 8, 1999
-138-
Mechanical Specifications