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3.6.15 Video BIOS Shadow
Software that resides in a read only memory (ROM) chip on a
device is called firmware. The Award BIOS permits shadowing
of firmware such as the system BIOS, video BIOS, and similar
operating instructions that come with some expansion peripher-
als such as, for example, a SCSI adaptor.
Shadowing copies firmware from ROM into system RAM, where
the CPU can read it through the 16-bit or 32-bit DRAM bus.
Firmware not shadowed must be read by the system through the
8-bit X-bus. Shadowing impoves the performance of the system
BIOS and similar ROM firmware for expansion peripherals. but
it also reduces the amount of high memory (640 KB to 1 MB)
available for loading device drivers, etc.
Enable shadowing into each section of memory separately. Many
system designers hardwire shadowing of the system BIOS and
eliminate a System BIOS Shadow option.
Video BIOS shadows into memory are C0000-C7FFF. The
remaining areas shown on the BIOS Features Setup screen may
be occupied by other expansion card firmware. If an expansion
peripheral in your system contains ROM-based firmware, you
need to know the address range the ROM occupies to shadow it
into the correct area of RAM.
The choices: Enabled(Default), Disabled.
These categories determine whether optional ROM will be copied
to RAM by 16K byte.
t
C8000-CBFFF Shadow: Disabled
t
CC000-CFFFF Shadow: Disabled
t
D0000-D3FFF Shadow: Disabled
t
D8000-DBFFF Shadow: Disabled
t
DC000-DFFFF Shadow: Disabled
3.6.16 Small Logo (EPA) Show
The choices: Enabled, Disabled
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SBC-657 User Manual
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