EMAC PCA-6782, User Manual

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81 PCA-6782 User Manual
Appendix B
I/O Pin
A
ssignments
B.30 DMA Channel Assignments
B.31 Interrupt Assignments
4D0h-4D1h Interrupt Controller
CF9h Reset Generator
290h-29Fh H/W monitor
C80h-CBFh Additional Serial I/O module
Table B.29: System I/O ports
Table B.30: DMA channel assignments
Channel Function
0 Available
1 Available
2 Floppy disk (8-bit transfer)
3 Available
4 Cascade for DMA controller 1
5 Available
6 Available
7
Available
Table B.31: Interrupt assignments
Priority Interrupt# Interrupt source
1 NMI Parity error detected
2 IRQ0 Interval timer
3 IRQ1 Keyboard
- IRQ2 Interrupt from controller 2 (cascade)
4 IRQ8 Real-time clock
5 IRQ9 Cascaded to INT 0A (IRQ 2)
6 IRQ10 Available/Serial communication port 3, 4, 5, 6
7 IRQ11 Available
8 IRQ12 PS/2 mouse
9 IRQ13 INT from co-processor
10 IRQ14 Primary IDE Channel
11 IRQ15 Secondary IDE Channel
12 IRQ3 Serial communication port 2
13 IRQ4 Serial communication port 1
14 IRQ5 Available
15 IRQ6 Diskette controller (FDC)
16 IRQ7 Parallel port 1 (print port)