User`s manual

PCA-6145 User’s Manual 68
Table C.14: Interrupt assignments
Priority Interrupt# Interrupt source
1 NMI Parity error detected
2 IRQ 0 Interval timer, counter 0 output
3 IRQ 1 Keyboard
- IRQ 2 Interrupt from controller 2 (cascade)
4 IRQ 8 Real-time clock
5 IRQ 9 Cascaded to INT 0AH (IRQ 2)
6 IRQ 10 Reserved
7 IRQ 11 Reserved
8 IRQ 12 PS/2 mouse
9 IRQ 13 INT from co-processor
10 IRQ 14 Fixed disk controller
11 IRQ 15 Reserved
12 IRQ 3 Serial communication port 2
13 IRQ 4 Serial communication port 1
14 IRQ 5 Parallel port 2
15 IRQ 6 Diskette controller (FDC)
16 IRQ 7 Parallel port 1 (print port)
Table C.15: Timer channel assignments
Channel Function
0 System timer
2 Refresh request generator
3 Tone generation for speaker