Abit PR5 User Manual page 64

The Shadow Feature
The term " Shadow" mentioned at right
refers to a performance enhancement
feature whereby the system BIOS and
video display card BIOS are copied into
system DRAM to speed up system op-
eration. The system BIOS is always
shadowed. It is highly advisable to
shadow the video BIOS. The other ad-
dress range options allow shadowing of
any other expansion card installed in
your system that has a BIOS.
OS Select For DRAM >64MB
If your system has more than 64MB of system memory
installed and you are using the OS/2 operating system,
set this to the OS2 setting. The default setting, Non-OS2,
is for all other operating systems.
Video BIOS Shadow
This copies the video display card BIOS into system
DRAM to increase display speed and is required for sys-
tem performance. The default setting is Enabled.
Shadowing Address Ranges
The next six lines, from C8000-CBFFF Shadow to DC000-
DFFFF Shadow are address ranges for shadowing other
expansion card ROMs. If there are any expansion cards
with ROMs installed in your system, you have to know
the address range they use to shadow them specifically.
The default setting for all of these is Disabled.
When you are done in this section press the Esc key to
return to the main menu.