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2-20 Chapter 2: Hardware information
2.5.3 Interrupt assignments
* These IRQs are usually available for PCI devices.
A B C D E F G H
PCI slot 1 — shared — — — — — —
PCI slot 2 — shared — — — — —
LAN(8056) — shared — — — — — —
PCIE x16 1 shared — — — — — — —
PCIE x16 2 shared — — — — — — —
PCIE x1 1 — — shared — — — — —
PCIE x1 2 — — — shared — — — —
USB controller 1 — — — — — — — used
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 — — — — — used — —
USB 2.0 controller 2 — — shared — — — — —
SATA controller 1 — — shared — — — — —
SATA controller 2 — shared — — — — used —
IRQ assignments for this motherboard
IRQ Priority Standard function
0 1 System Timer
1 2 Keyboard Controller
2 — Re-direct to IRQ#9
3 9 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 10 Primary IDE Channel
15 11 Secondary IDE Channel