70 PCA-6145/6145L User's Manual
DMA Page Addresses
Page register I/O Address
DMA Channel 0 0087
DMA Channel 1 0083
DMA Channel 2 0081
DMA Channel 3 0082
DMA Channel 5 008B
DMA Channel 6 0089
DMA Channel 7 008A
Refresh 008F
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)
Timer channel assignments
Channel Function
0 System timer
2 Refresh request generator
3 Tone generation for speaker
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