88 PCM-5820 Series User's ManualB.3 Interrupt assignmentsTable B-3: Interrupt assignmentsInterrupt# Interrupt sourceNMI Parity error detectedIRQ 0 Interval timerIRQ 1 KeyboardIRQ 2 Interrupt from controller 2 (cascade)IRQ 8 Real-time clockIRQ 9 ReserveIRQ 10 AvailableIRQ 11 Reserved for watchdog timerIRQ 12 PS/2 mouseIRQ 13 INT from co-processorIRQ 14 Preliminary IDEIRQ 15 Secondary IDE for CompactFlashIRQ 3 Serial communication port 2IRQ 4 Serial communication port 1IRQ 5 Audio*IRQ 6 Diskette controller (FDC)IRQ 7 Parallel port 1 (print port)* Audio default setting: IRQ5USB and Ethernet IRQ is automatically set by the system