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