2.5.3Interrupt assignments
Standard interrupt assignments
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 | Floppy Disk Controller |
7 | 15 | Printer Port (LPT1)* |
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 | Primary IDE Channel |
15 | 10 | Secondary IDE Channel |
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H |
PCI Slot 1 | shared | - | - | - | - | - | - | |
PCI Slot 2 | - | shared | - | - | - | - | - | - |
PCI Slot 3 | - | - | shared | - | - | - | - | - |
PCIe x16 slot | - | - | - | - | - | - | - | shared |
PCIe x1 slot 1 | - | - | - | - | - | shared | - | - |
PCIe x1 slot 2 | - | - | - | - | shared | - | - | - |
ASUS M2N / M2N DH |