Appendix120InterruptsInterrupt Source DeviceIRQ 0IRQ 1IRQ 2IRQ 3IRQ 4IRQ 5IRQ 6IRQ 7IRQ 8IRQ 9IRQ 10IRQ 11IRQ 12IRQ 13IRQ 14IRQ 15System TimerKeyboardCascadeIrDA / 2F8hSerial Port 1 / 3F8hAudioFloppy Disk Controller (FDC)Parallel PortReal Time Clock (RTC)USB/System CardBusReserved for PCMCIA cardReserved for PCMCIA card/MiniDock CardBusPS/2 MouseCo-processorHard diskCD-ROMDMA ChannelsController Channel Address Function11112222012345670087008300810082Cascade008B0089008AAudio(default)/IrDA(option)Audio(default)/ECP(option)IrDA(option)DisketteAudio(option)/FIR IrDA(default)/ECP(default)CascadeSpare