Asus P/I-P55SP3AV - Manual (Page 46)

Software Guide
PNP (Plug And Play)
The seven "IRQ ... Used By ISA" lines indicate whether or not
the IRQ indicated for each line is being used by a 'legacy'(non-PNP)
ISA card. The default setting "No/ICU" indicates either that the IRQ
is not in use by the ISA Bus or that ctn ISA Configuration Utility (ICU)
is being used to determine if an ISA card is using that IRQ. If you
install a legacy ISA card that needs a specific IRQ, and you are not
using an ICU, you must set the line for that IRQ to "Yes".
For example, if you install a PNP ISA card that needs to use IRQ
3, you would set the "IRQ 3 Used By ISA" line to "No/ICU". If, how­
ever, you install a legacy ISA card that needs to use IRQ 3, and you
are not using an ICU, set the "IRQ 3 Used By ISA" line to "Yes".
The three "DMA ... Used By ISA" lines indicate whether or not
the DMA chanel listed is being used by a legacy ISA card. The de­
fault setting "No/ICU" indicates either that the DMA channel is not
in use by the ISA Bus or that an ICU is being used to determine if an
ISA card is using that IRQ. If you install a legacy ISA card that needs
to use a specific DMA channel, and you are not using an ICU, you
must set the line for that charmel to "Yes".
If you have a legacy ISA card that uses ciny memory segment in
the C800h to DFFFh address range and you have not used an ICU to
specify the range it uses, you should set the base address and block
size by using the "ISA MEM Block BASE" line. When you select a
base address from the six options, the "ISA MEM Block SIZE" line
will appear and you can select a block size from the four options. If
you use an ICU to accomplish the same thing, leave "ISA MEM
Block BASE" on the default "No/ICU" setting. If you have more than
one legacy ISA card that needs to use this address range, you can
increase the block size as necessary.
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