Compaq W4000 manual Functional Description, Agp

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.

Card

Edge

Connector

AGP Bus

AGP 4X

I/F

NVIDIA Vanta LT Graphics Controller

				Memory
		Video			I/F
	Scalar
					CRT
				Controller
2D/VGA			3D Array		250-MHz
Engine			Engine
					RAM
					DAC

128-bit

100-MHz Data Bus

VSync

HSync

RGB

16 MB SDRAM Frame Buffer

Analog

Monitor

Connector

BIOS

ROM

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

D-2Compaq Personal Computers

Changed - October 2000