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Chapter 6 Graphics Subsystem
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September 1997
6-2
Graphics
Memory Bus
RGB Data
Monitor
(63..00)
6.2 SUBSYSTEM DESCRIPTION
The graphics subsystem consists of the S3 Trio64V2/GX graphics controller and two megabytes
of SGRAM for the frame buffer memory. The graphics BIOS code is included in the system
BIOS ROM. This subsystem provides full multimedia support (with software MPEG
acceleration) for a maximum resolution of 1024x768 with 256 colors @ 85 Hz, non-interlaced.
Figure 6–1.
S3 Trio64V2/GX-Based Graphics Subsystem, Block diagram
6.2.1 S3 TRIO64V2/GX GRAPHICS CONTROLLER
The S3 Trio64V2/GX graphics controller provides most of the functionality of the integrated
graphics subsystem and contains the features listed below:
♦
Quick Draw support
♦
DCI and DirectX video support
♦
MS DirectDraw support
♦
Horizontal and vertical interpolation
♦
On-the-fly stretching/blending of video streams
♦
Double-buffering for seamless video
♦
170-MHz 24-bit (true color) RAMDAC
♦
Designed for SGRAM operation
♦
VESA DDC1 and DDC2B support
S3 Trio64 V2/GX
Graphics
Controller
2-MB
SGRAM
32-Bit PCI Bus
Processor/
Memory
Subsystems