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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 USB
IRQ6
Floppy
IRQ7
- Reserved -
IRQ8 Real
Time
Clock
IRQ9
- Reserved -
IRQ10
- Reserved -
IRQ11 LAN
#1
IRQ12 PS2
Mouse
IRQ13 FPU
IRQ14 Primary
IDE
IRQ15
- Reserved -
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