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Address and Interrupt Tables C-3
C.3 Interrupt Levels
Priority Interrupt Number Interrupt Source
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
SMI
NMI
IRQ 0
IRQ 1
IRQ 2
IRQ 8
IRQ 9
IRQ 10
IRQ 11
IRQ 12
IRQ 13
IRQ 14
IRQ 15
IRQ 3
IRQ 4
IRQ 5
IRQ 6
IRQ 7
Power management unit
Parity error detected, I/O channel error
Interval timer, counter 0 output
Keyboard
Interrupt from controller 2 (cascade)
Real-time clock
Cascaded to INT 0AH (IRQ 2)
Reserved
Reserved
PS/2 mouse
INT from coprocessor
Hard disk controller
Reserved
Serial communication port 2
Serial communication port 1
Reserved
Diskette controller
Parallel port
A PCMCIA card can use IRQ 3, 4, 5, 7, 9 and 11 as long as it
does not conflict with the interrupt address of any other device.