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Interrupt Lines
The interrupt request line serves as the "pull line" for the expansion
cards to get attention of the CPU. The interrupt request line (IRQ) works
like the string you pull on a bus when you want the bus to stop. On a computer,
there is a limited amount of IRQ lines available. Although, on most computers
the amount provided is sufficient. Without an IRQ, some devices will not
even operate properly.
Note: If at all possible, avoid configuring
IRQs for devices. It is one of the least enjoyable aspects of the computer.
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