Isa Legacy Resources - IBM Aptiva Hardware Handbook

The following paragraphs describe each of these
options.
Cache Control. The Cache Control option allows you
to enable or disable Cache memory and shows you the
amount of Cache memory installed in your computer.
Your computer comes with the maximum of 256K of
cache memory installed.
Cache memory is special buffer storage that holds
frequently used instructions and data, and works faster
than main storage. With cache memory enabled, your
applications and programs run faster. You can disable
cache memory to slow down your computer.
ROM Shadowing. The Basic Input/Output System
(BIOS) is the machine language that runs your
computer. The BIOS in your computer is stored in
read-only memory called ROM.
The ROM Shadowing option allows you to store BIOS in
random access memory (RAM). Because RAM works
faster than ROM, your programs will run faster. To store
BIOS in RAM, you must enable the appropriate memory
region.

ISA Legacy Resources

If you are installing an ISA legacy (non-Plug and Play or
non-PCI) adapter card, you can use the ISA Legacy
Resources feature to manually configure the card. This
feature lets you set the following legacy resources
typically required by these adapter cards:
•
Memory resources
•
I/O port resources
72 Features of the Configuration/Setup Utility
•
DMA resources
•
Interrupt resources
The following paragraphs describe each of these
options.
Memory Resources. This option lets you allocate
system memory regions for a legacy adapter card. It lists
the hexadecimal addresses of the available memory
regions. You allocate memory to an adapter card by
choosing the Not Available setting for a particular
hexadecimal address.
Be sure to read the documentation that came with the
adapter card. You may need to make changes to the card
that match the selections you make for Memory
Resources. For example, you may have to move
jumpers or switches on the adapter card, or make
changes to the software that came with the adapter
card.
I/O Port Resources. This option lets you allocate I/O
ports for a legacy adapter card. It lists the hexadecimal
addresses of the available I/O ports. You allocate I/O
Ports to an adapter card by choosing the Not Available
setting for a particular hexadecimal address.
Be sure to read the documentation that came with the
adapter card. You may need to make changes to the card
that match the selections you make for I/O Port
Resources. For example, you may have to move
jumpers or switches on the adapter card, or make
changes to the software that came with the adapter
card.