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 | 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 | SATA Primary IDE (legacy mode) |
15 | 10 | SATA Secondary IDE (legacy mode) |
* These IRQs are usually available for PCI devices.
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H | |
PCI slot 1 | shared | – | – | – | – | – | – | – | |
PCI slot 2 | – | shared | – | – | – | – | – | – |
|
LAN (8001) | – | – | shared | – | – | – | – | – |
|
SATA (368) | shared | – | – | – | – | – | – | – |
|
PCIe x16_1 | shared | – | – | – | – | – | – | – |
|
PCIe x16_2 | shared | – | – | – | – | – | – | – |
|
PCIe x1_1 | shared | – | – | – | – | – | – | – |
|
PCIe x1_2 | – | – | shared | – | – | – | – | – |
|
PCIe x1_3 | – | – | – | 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 | – |
|
Chapter 2: Hardware information |