
UNO-2174A/2178A User Manual 28
Appendix A System Settings and Pin
Assignments
A.1 System I/O Address and Interrupt Assignment
Table A.1: UNO-2174A/2178A Interrupt Assignments
Interrupt No. Interrupt Source
NMI Parity Error Detected
IRQ 0 Interval timer
IRQ 1 Keyboard
IRQ 2 Interrupt from controller 2 (cascade)
IRQ 3 COM 2
IRQ 4 COM 1
IRQ 5 COM 4
IRQ 6 Diskette controller (FDC)
IRQ 7 COM 6
IRQ 8 Real-time clock
IRQ 9 Microsoft ACPI-Compliant System
IRQ 10 COM 3
IRQ 11 COM 5
IRQ 12 Microsoft PS/s Mouse
IRQ 13 INT from co-processor
IRQ 14 Primary IDE
IRQ 15 Secondary IDE
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