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If you have equipped your system with a PCI controller, changing this allows you to specify which
slot has the controller and which PCI interrupt (A, B, C or D) is associated with the connected hard
drives.
Remember that this setting refers to the hard disk drive itself, rather than individual partitions.
Since each IDE controller supports two separate hard drives, you can select the INT# for each.
Again, you will note that the primary had a lower interrupt than the secondary as described in “Slot
x Using INT#” above.
Selecting “PCI Auto” allows the system to automatically determine how your IDE disk system is
configured.
3.7.6 Primary IDE INT#
This item allows you to enable or disable the function of Primary IDE INT#.
Options
A (*)/ B / C / D
3.7.7 Secondary IDE INT#
This item allows you to enable or disable the function of Secondary IDE INT#.
Options
A / B (*)/ C / D
3.7.8 Slot 1 to Slot 4 Use IRQ NO.
These fields set how IRQ use is determined for each PCI slot. The default setting for each field is
Auto, which uses auto-routing to determine IRQ use.
Options
Auto (*) / 3/4/5/7/9/10/11/12/14/15
3.7.9 Used MEM base addr
Some add-in cards ask for a special range of the system address space. This field specifies the base
address of the memory address space.
Options
N/A (*) / C800 / CC00 / D000 / D400 / D800 / DC00
3.7.9.1 Used MEM Length
This field is available only when the
Used MEM base addr
field has been assigned to a base
address. It specifies the memory size for the add-in card used.
Options
8K (*) / 16K / 32K / 64K
3.7.10 Assign IRQ For USB
When disabled, the BIOS will not assign IRQ channel to USB controller.
Options
Enabled (*) / Disabled
