TYAN TIGERCUB ATX Manual page 51

PCI/VGA Palette Snoop
Your BIOS Setup many not contain this field. If the field is present,
leave at Disabled.
OS Select for DRAM > 64MB
Select OS2 only if you are running OS/2 operating system with greater
than 64 MB of RAM on your system.
MPS Version Control for OS
The BIOS supports versions 1.1 and 1.4 of the Intel multiprocessor
specification. Select the version supported by the operating system
running on this computer.
Shadow
Software that resides in a read-only memory (ROM) chip on a device
is called firmware. The EliteBIOS permits shadowing of firmware such
as the system BIOS, video BIOS, and similar operating instructions that
come with some expansion peripherals, 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. Shad-
owing improves 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 elimi-
nate a System BIOS Shadow option.
Video BIOS shadows into memory area 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.
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