Intel PD440FX Product Manual page 34

2
Using the BIOS Setup Program
routine may write into an area that is needed by
the ISA add-in card. The ISA Shared Memory
Size parameter signifies to the autoconfigure
routine that this block of memory is reserved and
should not be shadowed.
Shadowing copies a block of memory from an
add-in card's ROM to the same address in
computer DRAM memory. This improves
computer performance.
ISA Shared Memory Base Address
Sets the base address for the ISA shared
memory. The options are:
•
C8000h (default)
•
CC000h
•
D0000h
•
D4000h
•
D8000h
•
DC000h
This setting could affect the ISA Shared Memory
Size field. The value entered in the ISA Shared
Memory Size field cannot extend to the E0000h
address. For example, if a size of 64 KB were
selected, options D4000h, D8000h, and DC000h
would not appear.
34
If the ISA Shared Memory Size field is disabled,
this field will not appear.
IRQ 3, 4, 5, 7, 9, 10, 11, 14, 15
Sets the status of the IRQ. The options are:
•
Available (default)
•
Used By ISA Card
The PCI auto-configuration code looks here to
see if these IRQs are available for PCI add-in
cards. If an IRQ is available, the PCI auto-
configuration code can assign the IRQ to be
used by the computer. If your computer has an
ISA add-in card, select Used By ISA Card for
one of these IRQs.
NOTE
IRQs 5, 9, 10, and 11 are the default
user available IRQs. Depending on the
configuration of your computer, other
IRQs could be listed. If you have disabled
the parallel port or either of the serial ports,
more IRQs will be available. Refer to
Chapter 5 for information on reserved
and available IRQs.