Chapter 6 Embedded Graphics Subsystems
Compaq Deskpro Personal Computers
Third Edition - April 2001
6-6
6.3 NVIDIA GRAPHICS SUBSYSTEM
The NVIDIA TNT2 Pro AGP graphics controller is available in select Deskpro EN series
configurations as the premium graphics solution. This solution is resident on the system board in
Compaq Deskpro EN Small Form Factor systems and as a separate AGP card in Compaq Deskpro
EN Slim Desktop and Configurable Minitower systems. This subsection describes only the on-
board NVIDIA graphics subsystem used on Small Form Factor systems. The NVIDIA
graphics card used in Deskpro EN Slim Desktop/Configurable Minitower systems is
described in Appendix d.
Figure 6-3. NVIDIA TNT2 Pro Graphics Subsystem
The NVIDIA TNT2 Pro supports AGP 4X protocol, providing a peak transfer rate of 1GB/s. The
controller achieves high 3D performance with special rendering techniques such as single-cycle
multi-texturing and parallel triangle processing. The controller utilizes a portion of system
memory for texturing, instructions, and control while employing 16 megabytes of SDRAM for the
frame (display) buffer. Video BIOS is included in the system BIOS ROM and copied into system
memory at runtime.
Key features of the NVIDIA-based subsystem include:
♦ 300-MHz DAC
♦ QuickDraw, DirectX 6, PC98/99, Broadcast PC, DirectShow, OpenGL compatible
♦ 2D accelerator with:
• Programmable, transparent BitBLT
• Full acceleration MS DirectDraw support
• High speed 32-bit VGA core
♦ 3D accelerator with:
• Ultra-pipelined floating point engine
• Hardware dithering including LUT textures
♦ Video support features including:
• Color conversion and scaling
• 30-FPS DVD performance
♦ Universal driver compatibility allows easy upgrading to other NVIDIA controllers
HSync
128-bit
166-MHz
Data Bus
Monitor
Connector
RGB
NVIDIA TNT2 Graphics Controller
3D Array
Engine
Video
Scalar
300-MHz
RAM
DAC
CRT
Controller
Memory
I/F
AGP
Bus
82815
GMCH
VSync
2D/VGA
Engine
16 MB
SDRAM
AGP 4X
I/F
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