Compaq Deskpro EP 6233 Technical Reference Manual page 229

G.2.1 NVIDIA RIVA 128 GRAPHICS CONTROLLER
The NVIDIA RIVA 128 graphics controller provides most of the functionality of the graphics
subsystem and contains the features listed below:
230-MHz DAC
128-bit processing
2D accelerator with:
Transparent/stretch BitBLT, line draw, polygon/rectangle fill
Monochrome expansion
256 ROP support in 8-, 16-, 24-, and 32-bpp color depth
24-bpp true color w/1 MB memory
3D accelerator with:
4.2 Gflop floating point processor
Vertex caching
Perspective-correct true-color Gouraud lighting and texture mapping
Alpha blending, double buffering, Z-buffering, edge anti-aliasing
Perspective-correct specular highlights
VESA DDC1 and DDC2B support
Video processor/accelerator supporting the following formats:
YCrCb 4:2:2 and 4:2:0
Back-end video scaling
Power management for full VESA DPMS and EPA Energy Star compliance
Figure F-3 shows the basic architecture of the NVIDIA RIVA 128 controller, which is compatible
with software written for VGA, EGA, and CGA modes. Drivers are supplied for control of
graphics (GUI) accelerator engines used in extended VGA modes. The nVIDIA RIVA 128
includes multimedia support such as video overlay and DAC mode switching as well as VESA
standard feature connector (VSFC) baseline support. Video playback is accelerated with format
conversion, multi-tap x and y filtering, and color-space conversion.
AD31..0
AGP Bus
VD7..0
VESA
Connector
Figure G–3. NVIDIA RIVA 128 Graphics Controller Internal Architecture
More information on the NVIDIA RIVA 128 controller may be found at the following NVIDIA
web site: http://www.nvidia.com.
SGS nVIDIA RIVA 128
VGA
Controller
Host
Bus
I/F
Video
Processor Coprocessor
Original – April 1998
Technical Reference Guide
Memory
I/F
CRT
Controller
Drawing
RAM
DAC
Compaq Personal Computers
Graphics
Data
Memory
HSync
VSync
Red
Display
Green
Monitor
Blue
G-3