1.8.3Interrupt assignments
Standard interrupt assignments
| IRQ | Priority | Standard Function |
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0 | 1 | System Timer | ||
| 1 | 2 | Keyboard Controller |
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| 2 | — | — |
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| 3 | 11 | IRQ holder for PCI steering |
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| 4 | 12 | Communications Port (COM1) |
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| 5 | 13 | Standard IRQ holder for PCI steering |
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| 6 | 14 | Floppy Disk Controller |
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| 7 | 15 | Printer Port (LPT1) |
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| 8 | 3 | System CMOS/Real Time Clock |
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| 9 | 4 | Microsoft |
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| 10 | 5 | IRQ holder for PCI steering* |
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| 11 | 6 | IRQ holder for PCI steering* |
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| 12 | 7 | PS/2 Compatible Mouse Port |
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| 13 | 8 | Numeric Data Processor |
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| 14 | 9 | Primary IDE Channel |
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* These IRQs are usually available for PCI devices.
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H |
PCI1 | shared | shared | shared | shared | — | — | — | — |
PCI2 | shared | shared | shared | shared | — | — | — | — |
PCIEX16_1 | shared | — | — | — | — | — | — | — |
PCIEX1_1 | shared | — | — | — | — | — | — | |
Onboard USB controller 1 | — | — | — | — | shared | — | — | — |
Onboard USB controller 2 | — | — | — | — | — | shared | — | — |
Onboard USB 2.0 controller | — | — | — | — | — | — | shared | — |
Onboard HD audio | — | — | shared | — | — | — | — | — |
Onboard LAN | — | — | — | shared | — | — | — | — |
Onboard IDE port | shared | — | — | — | — | — | — | — |
Onboard SATA port | — | shared | — | — | — | — | — | — |
ASUS |