Specifications

B B
B-1
Appendix B -
Interrupts and DMA
Channels
Interrupts
The assignment of interrupts for the EPC-8 is shown in the following table:
NMI DRAM parity error, EXM expansion interface I/O channel
check
IRQ0 timer
IRQ1 keyboard
IRQ2 IRQ8 - IRQ15 cascade through IRQ2
IRQ3 COM2 serial port
IRQ4 COM1 serial port
IRQ5 unassigned
IRQ6 usually needed for floppy disk controller
IRQ7 LPT1 parallel port
IRQ8 clock
IRQ9 unassigned
IRQ10 VME interrupt/event
IRQ11 unassigned
IRQ12 unassigned
IRQ13 coprocessor
IRQ14 used by IDE disk controller
IRQ15 unassigned
Table B-1. Interrupts.
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