IBM CI5VGM Series, User Manual

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Appendix
130 CI5VGM User’s Manual
B. Interrupt Request Lines (IRQ)
There are a total of 15 IRQ lines available on the Industrial CPU Card.
Peripheral devices use interrupt request lines to notify CPU for the
service required. The following table shows the IRQ used by the devices
on the Industrial CPU Card.
Level Function
IRQ0 System Timer Output
IRQ1 Keyboard
IRQ2 Interrupt
Cascade
IRQ3 Serial Port #2
IRQ4 Serial Port #1
IRQ5 Parallel Port #2
IRQ6 Floppy Disk Controller
IRQ7 Parallel Port #1
IRQ8 Real Time Clock
IRQ9 Software Redirected to Int 0Ah
IRQ10 Reserved
IRQ11 Reserved
IRQ12 Reserved
IRQ13 80287
IRQ14 Primary
IDE
IRQ15 Secondary IDE