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Functional Description 4–11
Interrupts
1
The # symbol indicates an active low signal.
Table 4–3 ISA Interrupts
Interrupt
Number Interrupt Source
IRQ0 Internal timer
IRQ1 Keyboard
IRQ2 Interrupt from controller 2
IRQ3 COM2
IRQ4 COM1
IRQ5 Available
IRQ6 Diskette (floppy)
IRQ7 Parallel port
IRQ8#
1
Reserved
IRQ9 Available
IRQ10 USB
IRQ11 Available
IRQ12 Mouse
IRQ13 Available
IRQ14 EIDE
IRQ15 EIDE