American Megatrends MegaPro User Manual page 59

Chipset Setup,
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ISA VGA USWC/Video Frame Buffer
This option specifies the starting address of the VGA video frame buffer
using USWC memory.
Setting
Disabled No VGA video frame buffer is available.
A0000h The system memory segment beginning at A0000h is
used for the VGA USWC/video frame buffer.
B0000h The system memory segment beginning at B0000h is
used for the VGA USWC/video frame buffer.
Both The 128 KB of system memory from A0000h through
BFFFFh is used for the VGA USWC/video frame buffer.
VGA card drivers may not behave correctly when this option is not set
to Disabled. The Optimal and Fail–Safe default settings are Disabled.
PCI VGA USWC/Video Frame Buffer
Set this option to Enabled to enable the USWC memory attribute and
improve video performance when a PCI video adapter is installed.
However, VGA card drivers may not behave correctly when this option
is set to Enabled. The settings are Disabled or Enabled. The Optimal and
Fail–Safe defaults are Disabled.
Optional ROM
The MegaPro PCI Pentium Pro motherboard has an empty option ROM
socket near the ISA expansion slots. You can install a 32 KB ROM in
this socket. The starting memory address of this ROM can be either
C000h only if this computer does not have a VGA controller, C800h,
D000h, or D800h. The following three Chipset Setup options configure
the option ROM only if you have installed a ROM chip in the option
ROM socket.
Optional ROM Decode
This option specifies the starting address of an adapter ROM to be
decoded. The settings are C000h, C800h, D000h, D800h, or Disabled.
The Optimal and Fail–Safe defaults are Disabled.
Chapter 2 WINBIOS Setup
The settings are:
Description
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