Asus Z8PH-D12 SE/QDR - Manual (Page 38)

2-20 Chapter 2: Hardware information
* These IRQs are usually available for ISA or PCI devices.
IRQ Priority Standard function
0 1 System Timer
1 2 Keyboard Controller
2 - Programmable Interrupt
4* 12 Communications Port (COM1)
5* 13 --
6 14 Floppy Disk Controller
7* 15 --
8 3 System CMOS/Real Time Clock
9* 4 ACPI Mode when used
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
2.5.3 Interrupt assignments
Standard Interrupt assignments