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Chapter 2. System board features
Video subsystem
The video subsystem includes the Intel 810 graphics controller integrated in the Graphics Memory
Controller Hub (GMCH) and 4MB of 100MHz local graphics display cache SDRAM.
Graphics memory controller hub (Super Video Graphics Array)
The video subsystem uses system memory for display buffer, commands, and 3D textures on
AGP-enabled operating systems via Dynamic Video Memory Technology (DVMT). The Intel 810 graphics
controller drivers will adjust the memory footprint depending on available system memory, current desktop
resolution, and presence of the display cache local memory. DVMT employs direct AGP and intelligent
arbitration to dynamically allocate and deallocate memory for textures for applications requiring additional
texture memory.
The operating system requires allocation of up to 1MB of system memory to support legacy VGA. System
properties will display up to 1MB less than physical system memory available to the operating system.
The integrated graphics memory controller hub supports all video graphics array (VGA) modes and is
compliant with super video graphics array (SVGA) modes and Video Electronics Standards Association
(VESA) 1.2. Some of the features are:
2D and 3D hardware acceleration with hardware cursor
Integrated 230 MHz RAMDAC for up to 1600x1200 at 85Hz resolution
Hardware Motion Compensation via Intel HWMC Software Development Kit
Advanced Power Management (APM)
Advanced Configuration and Power Interface (ACPI)
On Now (Suspend to RAM)
Plug and Play
VESA Display Data Channel version DDC2B
GDI, Direct X, and OpenGL v1.1 Application Programming Interfaces
The integrated graphics memory controller subsystem supports the VESA Display Data Channel (DDC)
standard 1.1 and uses DDC1 and DDC2B to determine optimal values during automatic monitor detection.
The video subsystem has the following resource assignments:
Figure 2. Video subsystem resources
Resource Assignment
ROM (hex) C0000–C7FFF (32KB)
RAM (hex) A0000–BFFFF
I/O (hex) 3B0–3BB, 3C0–3DF
IRQ PCI interrupt #A (default assigned to ISA IRQ #1)
DMA None
For further information on resource assignments, see Appendix B, “System address maps” on page 36
and Appendix C, “IRQ and DMA channel assignments” on page 40.
6 Technical Information Manual