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 |
PCI 1 | shared | – | – | – | – | – | – | – |
PCI 2 | – | shared | – | – | – | – | – | – |
1394 | – | – | – | shared | – | – | – | – |
LAN 1 | – | – | shared | – | – | – | – | – |
LAN 2 | – | – | – | shared | – | – | – | – |
Marvell 6121 | – | – | – | shared | – | – | – | – |
Marvell 6320 | shared | – | – | – | – | – | – | – |
PCIe x16 1 | shared | – | – | – | – | – | – | – |
PCIe x16 2 | shared |
| – | – | – | – | – | – |
PCIe x16 3 | – | – | shared | – | – | – | – | – |
PCIe x16 4 | – | shared | – | – | – | – | – | – |
PCIe x1 | – | shared | – | – | – | – | – | – |
Azalia | shared | – | – | – | – | – | – | – |
USB controller 1 | – | shared | – | – | – | – | – | – |
USB controller 2 | – | shared | – | – | – | – | – | – |
SATA controller 0 | shared | – | – | – | – | – | – | – |
SATA controller 1 | shared | – | – | – | – | – | – | – |
SATA controller 2 | shared | – | – | – | – | – | – | – |
ASUS P5N64 WS Professional |