Air 486PH, User Manual, Page: 46 / 48

APPENDIX E: INTERRUPT LEVEL ASSIGNMENTS
LEVEL
on
SYSTEM
TYPICAL INTERRUPT SOURCE
NMI Parity, AT Channel Check,
Bus Time Out, Fail Safe Timer Timeout
IRQ0 Interval Timer 1, Counter 0 Out
IRQ1 Keyboard Controller
IRQ2 Cascade Interrupts from IRQ8 to IRQ15
IRQ3 Serial Port 2
IRQ4 Serial Port 1
IRQ5 Parallel Port 2
IRQ6 Diskette Controller
IRQ7 Parallel Port 1
IRQ8 Real Time Clock
IRQ9 Expansion Bus Pin
IRQ10 Expansion Bus Pin
IRQ11 Expansion Bus Pin
IRQ12 Expansion Bus Pin
IRQ13 Coprocessor Error, DMA Chaining
IRQ14 Fixed Disk Drive Controller
Expansion Bus Pin
IRQ15 Expansion Bus Pin