2.5.3Interrupt assignments
| IRQ |
| Priority |
| Standard function |
| |
| 0 | 1 |
| System timer |
| ||
| 1 |
| 2 |
| Keyboard controller |
|
|
| 2 |
| – |
|
|
| |
| 3 |
| 11 |
| IRQ holder for PCI steering* |
|
|
| 4 |
| 12 |
| Communications port (COM1)* |
|
|
| 5 |
| 13 |
| IRQ holder for PCI steering* |
|
|
| 6 |
| 14 |
| Floppy disk controller |
|
|
| 7 |
| 15 |
| IRQ holder for PCI steering* |
|
|
| 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 |
| PS/2 compatible mouse port* |
|
|
| 13 |
| 8 |
| Numeric data processor |
|
|
| 14 |
| 9 |
| IRQ holder for PCI steering* |
|
|
| 15 |
| 10 |
| IRQ holder for PCI steering* |
|
|
* These IRQs are usually available for PCI devices.
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H |
PCI1 | shared | – | – | – | – | – | – | – |
1394 (FW322) | – | – | – | shared | – | – | – | – |
LAN 1 (8111C) | shared | – | – | – | – | – | – | – |
LAN 2 (8111C) | shared | – | – | – | – | – | – | – |
Marvell 6121 |
| – | – | shared | – | – | – | – |
PCIEX16_1 | shared | – | – | – | – | – | – | – |
PCIEX16_2 | shared | – | – | – | – | – | – | – |
PCIEX1_1 | shared | – | – | – | – | – | – | – |
PCIEX1_2 | shared | – | – | – | – | – | – | – |
PCIX_1 | shared |
| – | – | – | – | – | – |
USB controller 1 |
| – | – | – | – | – | – | shared |
USB controller 2 | – |
| – | shared | – | – | – | – |
USB controller 3 | – | – | shared | – | – | – | – | – |
USB controller 4 | shared | – | – | – | – | – | – | – |
USB controller 5 | shared |
| – | – | – | – | – | – |
USB controller 6 | – | – |
| – | – | shared | – | – |
USB 2.0 controller 1 |
| – | – | – | – | – | – | shared |
USB 2.0 controller 2 | – | – | shared | – | – | – | – | – |
SATA controller 1 | – |
| shared | – | – | – | – | – |
SATA controller 2 | – |
| – | shared | – | – | – | – |
ASUS P5Q WS |