Asus M2A-MX - Manual (Page 33)

ASUS M2A-MX 1-21
* These IRQs are usually available for ISA or PCI devices.
Interrupt assignments
IRQ Standard Function
0 System timer
1 Keyboard controller
2 Programmable interrupt controller
3 Standard OpenHCI USB Host Controller
4 Communications Port (COM1)
5 HD Audio Controller
6 Standard floppy disk controller
7 (free)
8 System CMOS/real time clock
9 (free)
10 Standard PCI Graphics Adapter (VGA)
11 Sata controller
12 PS/2 Port Mouse controller
13 Numeric data processor
14 Primary IDE controller
15 Secondary IDE controller