Intergraph InterServe 8000 System Reference Manual page 65

I/O Controller
Lithium
Battery
BIOS
Palette DAC
WRAM
Graphics Accelerator
The graphics accelerator (Matrox MGA-2064W) interfaces to the system board through the PCI bus.
This accelerator supports all of the standard VGA graphics modes in addition to native modes capable
of resolutions up to 1600 x 1200. The frame buffer interface is 64 bits wide and is clocked at 100
MHz. Color depths of 4, 8, 16, 24, and 32 bits are supported, allowing a resolution of 1280 x 1024 (24
bit color depth) in only 4 MB of frame buffer memory. Features such as bit block transfer (BitBlt),
Line Draws, and Fills provide hardware acceleration for Windows. Video playback is accelerated
through scaling and YUV to RGB color space conversion.
Palette DAC
The palette DAC operates up to 175 MHz and converts the digital RGB data in the frame buffer to
analog signals for the monitor. The device includes two fully programmable phase-locked loop clock
sources for both the memory clock and the pixel clock.
Window RAM
Window RAM (WRAM) is the video memory used by the MGA-2064W. The graphics frame buffer
consists of two 256K x 32 WRAM components for 2 MB of video memory. WRAM is a dual-ported
video memory specially designed to accommodate common drawing functions, offering higher graphics
performance at a lower cost than standard Video RAM.
PCI-to-ISA
Bridge
Graphics
Accelerator
SCSI
Controller
PCI-to-PCI
Bridge
2
I C Chip
(U63)
57