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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
IRQ7
- Reserved -
IRQ8
Real Time Clock
IRQ9
Display Control
IRQ10
- Reserved -
IRQ11
IRQ12
- Reserved -
IRQ13
IRQ14
Primary IDE
IRQ15
- Reserved -
71
USB
LAN #1
FPU
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