Technical Reference Guide
Monitor
Connector
82815 GMCH
Direct AGP Graphics Controller
3D
Engine
2D
Engine
RGB
Pipelined
Preprocessor
RAM
DAC
HSync
HSync
AGP
I/F
FSB I/F &
SDRAM
Cntlr.
AGP Bus
4 MB SDRAM
Display Cache
Figure 6-2. 82815 GMCH Integrated Graphics Subsystem
The integrated graphics controller includes special enhancements for 2D operations. Motion
compensation logic is included to improve performance during software decoding of MPEG2
video. Hardware cursor and overlay engines relieve software processing and provide independent
gamma correction, saturation, and brightness control.
The 230-MHz RAMDAC can support a variable-scan rate monitor up to a maximum resolution of
1600 x 1200 with 256 colors. Video BIOS for the controller is held in the system BIOS ROM and
copied into systems memory at runtime for maximum performance.
6.2.1.1 Feature Summary
♦ Accelerated driver support for Windows 3.1/95/98/2000, Windows NT 4.0, OS/2
♦ MS ActiveMovie and Media Player support for Win95
♦ Direct 3D support
♦ MS Direct Draw 5/6 support
♦ AGP 2X interface
♦ DDC2B compliant
♦ Accelerator engine support for:
• 3-ROP BitBLT
• Line Draw
• Color expansion
• Video color conversion/scaling
• Motion video
• Triangle setup
Compaq Deskpro and Evo Personal Computers
Featuring Intel Celeron and Pentium III Processors
Fifth Edition - March 2002
6-3
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