SOM-4486 User’s Manual
42
B.3 Interrupt assignments
Table B.3: Interrupt assignments
Interrupt#
Interrupt source
NMI
Parity error detected
IRQ 0
Interval timer
IRQ 1
Keyboard
IRQ 2
Interrupt from controller 2 (cascade)
IRQ 3
Serial communication port 2
IRQ 4
Serial communication port 1
IRQ 5
Available
IRQ 6
Diskette controller (FDC)
IRQ 7
Parallel port 1 (print port)
IRQ 8
Real-time clock
IRQ 9
Reserve
IRQ 10
Available
IRQ 11
Reserved for watchdog timer
IRQ 12
PS/2 mouse
IRQ 13
INT from co-processor
IRQ 14
Preliminary IDE
IRQ 15
Secondary IDE for CompactFlash
USB and Ethernet IRQ is automatically set by the system
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