Abit IT5 Series User Manual page 68

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PCI PnP BIOS Auto-Config:
This option enables or disables the BIOS capability to automatically assign
IRQs. The BIOS default is Disable.
When you select Enable, the BIOS will automatically assign the correct
IRQ to the interrupt number (INT#) of the PCI slots. When this option is
disabled, you have to assign IRQs used by the interrupt number (INT#) of
the PCI slots.
Xth Available IRQ:
You can select four IRQs out of the 10 listed (IRQ3, 4, 5, 7, 9, 10, 11, 12,
14, 15) to be assigned for use by the interrupt number (INT#) of the PCI
slot
.
1st Available IRQ:
This means that the first interrupt number (INT#) found on the PCI bus
will use this IRQ. That is, this IRQ will be assigned to the first interrupt
number (INT#) found on the PCI bus.
2nd Available IRQ:
This means that the second interrupt number (INT#) f ound on the PCI
bus will use this IRQ. That is, this IRQ will be assigned to the second
interrupt number (INT#) found on the PCI bus.
The third and the fourth available IRQ will be assigned in
sequence to the third and the fourth interrupt numbers (INT#)
found on the PCI bus.
PCI IDE Card 2nd Channel:
This option can be enabled or disabled. BIOS default is Enable.
Since this channel uses IRQ15, if you want to use this channel, you have
to enable this option to make the BIOS assign IRQ15 to this channel.
PCI IDE Card IRQ Map to:
Three options are available for this item: PCI Auto, PCI-slotX and ISA.
ä PCI-Auto: The onboard BIOS auto-detects which PCI slot has an
IDE card inserted in.
Chapter 3