APPENDIX
MI961 User’s Manual
55
B. Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service
required. The following table shows the IRQ used by the devices on
board.
Level
Function
IRQ0
System Timer Output
IRQ1
Keyboard
IRQ3
Serial Port #2
IRQ4
Serial Port #1
IRQ5
Serial Port #3
IRQ5
Serial Port #4
IRQ8
Real Time Clock
IRQ14
Primary IDE
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