Rom Shadowing; Pci Card Options - IBM Aptiva Handbook

Cache system BIOS
If the Cache State option is enabled, you can use the
Cache System BIOS option to specify whether your
computer runs the system BIOS region in cache
memory. With this option enabled, your computer's
performance improves.
You might need to disable this option when you are
using a program that attempts to write to the BIOS.
Some older virus checking programs may attempt to
write to the BIOS.

ROM shadowing

The ROM Shadowing menu shows which system
devices are using read-only memory (ROM) shadowing.
With ROM shadowing, your computer stores data from
the specified device in random access memory (RAM).
Since your computer can access data in RAM faster than
it can access data from ROM, programs run faster when
ROM shadowing is enabled.
If you install an adapter card that has its own ROM, you
can enable the ROM shadowing option for that card so
the card will run faster. PnP and PCI cards have their
own ROM.
The ROM Shadowing option may not work on cards
Note:
that use memory-mapped I/O, such as network cards.

PCI card options

The PCI Card Options menu lets you enable or disable
bus mastering for the Peripheral Component
Interconnect (PCI) adapter cards installed in your
computer. Bus mastering lets installed bus master PCI
cards process information without using the
microprocessor.
If PCI cards do not operate properly, you might need to
disable this option.
Using the Setup Utility 51