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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
- Reserved -
IRQ6 USB
IRQ7
- Reserved -
IRQ8 Real
Time
Clock
IRQ9
Display Control
IRQ10
Serial Port #3
IRQ11
Serial Port #4
IRQ12
- PS2 Mouse -
IRQ13 FPU
IRQ14 Primary
IDE
IRQ15
- Reserved -
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