Appendix D Matrox 1064SG Graphics Card
Compaq Personal Computers
Original - September 1997
D-2
64-Bit Graphics
Memory Bus
RGB Data
Monitor
Connector
VD7..0
(63..00)
(23..00)
D.2 FUNCTIONAL DESCRIPTION
The Matrox MGA 1064SG graphics card is based on the Matrox MGA-1064SG graphics
accelerator. The card includes two megabytes of SGRAM frame buffer memory, expandable to
four megabytes with the addition of an optional 2-MB SGRAM module. .
Figure D–2.
Matrox MGA 1064SG Graphics Card Block diagram
The graphics BIOS code is contained in the on-board BIOS ROM and copied into the system
memory’s DOS compatibility area. The following S3 drivers are provided with the system:
♦
Windows 3.11
♦
Compaq Win95
♦
Compaq Windows NT
♦
OS/2 2.1 and 3.0 (Warp)
The MGA-1064SG controller contains a 32-bit VGA core (compatible with SVGA, VGA, EGA,
and CGA software)with hardware acceleration engines for line draw, BitBLT, and 2D polygons.
The controller also includes a 3D graphics engine that provides Gouraud shading and high
quality texture mapping with perspective correction. Additional features include:
♦
Video engine with true linear X/Y scaling and color-space conversion
♦
Integrated RAMDAC and PPL clock generator with 220 MHZ pixel clock support
♦
Synchronous (SGRAM) interface supporting 100 MHz
The board includes a 3.5 volt regulator for the MGA controller so that the card can be used in 5-
volt-only PCI systems.
The video BIOS is contained in a flash ROM component that can be updated in the field if
necessary.
The on-board 2-MB SGRAM frame buffer can be expanded to four megabytes by installing an
optional 2-MB expnasion module (Compaq p/n 270834-B21).
MGA-1064SG
Graphics
Controller
32-Bit PCI Bus
2-MB Frame Buffer
SGRAM
Module
PCI Edge
Connector
Optional
.
VSFC
Connector
2-MB
Frame Buffer
SGRAM
BIOS
ROM
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