25 Appendix A
Table A.2: UNO-2173A/AF Interrupt Assignment
Interrupt No. Interrupt Source
NMI Parity error detected
IRQ 0 Interval timer
IRQ 1 Keyboard
IRQ 2 Interrupt from controller 2 (cascade)
IRQ 3 COM2
IRQ 4 COM1
IRQ 6 Diskette controller (FDC)
IRQ 7 Parallel port 1 (print port)
IRQ 8 Real-time clock
IRQ 10 COM3
IRQ 12 PS/2 mouse
IRQ 13 INT from co-processor
IRQ 14 Primary IDE
IRQ 15 Secondary IDE