2.5.3 Interrupt assignments
Standard interrupt assignments
* These IRQs are usually available for PCI devices.
IRQ Priority Standard function
0 1 System Timer
1 2 Keyboard Controller
2 – Redirect to IRQ#9
4 12 Communications Port (COM1)*
5 13 IRQ Holder for PCI Steering*
6 14 Reserved
7 15 Reserved
8 3 System CMOS/Real Time Clock
9 4 IRQ Holder for PCI Steering*
10 5 IRQ Holder for PCI Steering*
11 6 IRQ Holder for PCI Steering*
12 7 Reserved
13 8 Numeric Data Processor
14 9 Primary IDE Channel
IRQ assignments for this motherboard
A B C D E F G H
PCIEX16_1 shared – – – – – – –
PCIEX16_2 shared – – – – – – –
PCIEX16_3 shared – – – – – – –
PCIEX16_4 shared – – – – – – –
PCIEX16_5 shared – – – – – – –
PCIEX1_1 shared – – – – – – –
LAN1 (8112L) – – – shared – – – –
LAN2 (8112L) – – shared – – – – –
SATA controller 1 – – shared – – – – –
SATA controller 2 – – shared – – – – –
USB 2.0 controller 1 – – – – – – – shared
USB 2.0 controller 2 shared – – – – – – –
1394 controller – – shared – – – – –
HD Audio – – – – – – shared –
PCI_1 shared – – – – – – –
2.5.4 PCI slot
The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other
of the slot.
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