D.3 Interrupt assignments
Table
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 | |
IRQ 9 | Reserve |
IRQ 10 | Available |
IRQ 11 | Reserved for watchdog timer |
IRQ 12 | PS/2 mouse |
IRQ 13 | INT from |
IRQ 14 | Preliminary IDE |
IRQ 15 | Secondary IDE for CompactFlash |
USB and Ethernet IRQ is automatically set by the system
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