APPENDIX58 MI800 User’s ManualB. Interrupt Request Lines (IRQ)Peripheral devices use interrupt request lines to notify CPU for theservice required. The following table shows the IRQ used by the deviceson board.Level FunctionIRQ0 System Timer OutputIRQ1 KeyboardIRQ2 Interrupt CascadeIRQ3 Serial Port #2IRQ4 Serial Port #1IRQ5 ReservedIRQ6 Floppy Disk ControllerIRQ7 Parallel Port #1IRQ8 Real Time ClockIRQ9 ReservedIRQ10 ReservedIRQ11 ReservedIRQ12 PS/2 MouseIRQ13 80287IRQ14 Primary IDEIRQ15 Secondary IDE
