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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
IRQ0
System Timer Output
IRQ1
Keyboard
IRQ2
Interrupt Cascade
IRQ3
Serial Port #2
IRQ4
Serial Port #1
IRQ5
IRQ6
Floppy Disk Controller
IRQ7
Parallel Port #1
IRQ8
Real Time Clock
IRQ9
IRQ10
IRQ11
USB#2/LAN /VGA
IRQ12
USB#3/PS2 Mouse
IRQ13
IRQ14
Primary IDE
IRQ15
Secondary IDE (CF)
Function
USB#0
SM-BUS
USB#1
FPU
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