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The following is a list of IRQ's Interrupt ReQuests, which can be
exempted much as the COM ports and LPT ports above can. When an I/O
device wants to gain the attention of the operating system, it signals this by
causing an IRQ to occur. When the operating system is ready to respond to
the request, it interrupts itself and performs the services.
•
IRQ3 (COM 2 )
•
IRQ4 (COM 1)
•
IRQ5 (LPT 2)
•
IRQ6 (Floppy Disk)
•
IRQ7 (LPT 1)
•
IRQ8 (RTC Alarm)
•
IRQ9 (IRQ2 Redir)
•
IRQ10 (Reserved)
•
IRQ11 (Reserved)
•
IRQ12 ( PS / 2 Mouse )
•
IRQ13 (Coprocessor)
•
IRQ14 (Hard Disk)
•
IRQ15 (Reserved)
3-23
®
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