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Appendix D Compaq/NVIDIA Vanta LT AGP Graphics Card
D.2 FUNCTIONAL DESCRIPTION
The Compaq/NVIDIA Vanta LT Graphics Card provides high performance 2D and 3D display
imaging. The card’s AGP design provides an economical approach to 3D processing by off-
loading 3D effects such as texturing, z-buffering and alpha blending to the system memory while
8 megabytes of on-board SDRAM stores the main display image.
128-bit
100-MHz
Data Bus
HSync
Analog
Monitor
Connector
RGB
BIOS
ROM
NVIDIA Vanta LT Graphics Controller
3D Array
Engine
Video
Scalar
250-MHz
RAM
DAC
CRT
Controller
Memory
I/F
AGP
Bus
Card
Edge
Connector
2D/VGA
Engine
AGP 4X
I/F
VSync
16 MB SDRAM
Frame Buffer
Figure D-2. Compaq/NVIDIA Vanta LT Graphics Card Block diagram
The Compaq/NVIDIA Vanta LT Pro Graphics Card includes the following features:
♦ 8-MB SDRAM frame buffer using 128-bit 100-MHz access
♦ AGP 2X transfers with sideband addressing
♦ 2D drawing engine providing:
• 3 ROP BtBLT
• Triangle BLT
• Stretch BLT
• Line and poly draw
• Color expansion
• Coor conversion and scaling
♦ 3D rendering engine with:
• Triangle setup
• Anistropic filtering
• Flat and Gouraud shading
• Trilinear filtering
• TwinTexel engine
♦ 250-MHz RAMDAC
♦ 32-bit Z/stencil buffer eliminates hidden screen portions for faster loading
♦ 32-bit color for increased image quality
♦ 30-fps full-screen DVD playback
♦ Dual-monitor support with a PCI graphics card
Compaq Personal Computers
Changed - October 2000
D-2