User guide

PH440 NLX Motherboard User Guide September 1998
MITSUBISHI ELECTRIC MOTHERBOARD DIVISION PAGE 21 OF 51
VIDEO
VGA Controller
The VGA controller is an ATI Rage Pro or ATI Rage IIC device packaged in a 256 ball BGA.
Video memory is via 2 SGRAM devices mounted on the motherboard (to give 2MB or 4MB)
and an SODIMM connector that accepts SGRAM modules (2MB or 4MB extra). The VGA
controller can be disabled via a motherboard jumper. It also provides an I
2
C bus to access other
video features. The VGA controller has the following features.
♦
AGP compliant to 133MHz (66MHz option).
♦
230MHz integrated RAMDAC.
♦
100MHz 64-bit SGRAM video memory (800MBps).
♦
DDC1, DDC2B, DPMS and Energy Star.
♦
2D acceleration.
♦
3D acceleration with triangle setup engine and texture cache (Rage Pro only).
♦
Motion video acceleration with MPEG2 assist.
♦
Multimedia channel for upgrades (AMC connector).
The allowable memory upgrade paths are shown in the table below. The entries are the total
memory capacity available by fitting 2MB or 4MB modules.
Motherboard
Memory
1
2MB SODIMM 4MB SODIMM
2
0MB 2MB 4MB
2MB 4MB
4MB 8MB
The amount of video memory fitted to the motherboard is automatically detected by the BIOS.
Video memory upgrade modules do not require an SPD ROM.
1
2MB builds are based on 8Mb devices. 4MB builds use 16Mb devices.
2
4MB modules must be based on 16Mb devices.