Compaq Deskpro 4000 - Figure E-2. Matrox Mga M; E.2 Functional Description

Appendix E Matrox Millennium II Graphics Card
Compaq Personal Computers
Original - September 1997
E-2
Mem. Bus
System
Controller
Serial
Pixel Data /64
Monitor
RGB
& Sync Data
E.2 FUNCTIONAL DESCRIPTION
The Matrox MGA Millennium-II Graphics Card installs in an AGP slot. The card is AGP-
compliant. Operation of the AGP bus is almost identical to the PCI bus but operates at Host bus
speed (i.e., in systems with the Pentium II 233, 266, or 300 processor the AGP bus operates at 66
MHz). This graphics card is based on the MGA 2164W graphics controller and comes standard
with four megabytes of WRAM for the frame buffer (Figure E-2). The RAMDAC functions are
provided by the Texas Instruments TVP 3026 component.
Figure E–2
. Matrox MGA Millennium-II Graphics Card Block diagram
The Matrox Millennium-II Graphics Card includes the following features:
♦ Hardware-accelerated true-color mode support
♦ AGP 1X operation
♦ Hardware-assisted texture mapping
♦ Aligned BitBLT support
♦ Standard 4-MB frame buffer with support for up to 16 megabytes of WRAM
♦ 250 MHz Phase-Locked-Loop (PLL) pixel clock (supports 1920x1200 at 75 Hz)
♦ Improved 3D acceleration over earlier generation (2064W) controller
The video BIOS is contained in a flash ROM component allowing easy field updating if required.
The Windows RAM (WRAM) used by the Millennium-II card provides high performance for full
motion video requirements. By handling most block transfers (BLTs) internally, the WRAM
relieves the graphics controller from having to provide direct support for most video and drawing
tasks. The standard of four megabytes of WRAM is expandable by adding a 4-MB WRAM
module (Compaq kit # 270831-B21) or 12-MB WRAM module (Compaq kit # 270833-B21),
increasing the total graphics memory to twelve megabytes. Other WRAM modules from Matrox
may also be used for frame buffer expansion. Adding WRAM increases the resolution and color
depth capability of the graphics controller (refer to Table E-2).
MGA 2164W
Graphics
Controller
32-Bit
AGP Bus
BIOS
ROM
4-MB
WRAM
WRAM
Exp.
Module
TVP 3026
DAC
Optional