Interrupt levels
IRQ
Device
0
1
Keyboard
2
3
Onboard serial port B (COM2) (enabled)
4
Onboard serial port A (COM1) (enabled)
5
ACPI (reserved)
6
Onboard floppy disk drive controller
7
8
Real-time clock (RTC)
9
USB controller
10
11
12
Onboard PS/2 mouse port
13
Coprocessor
14
IDE controller
15
IDE controller
134