Cabletron Systems E1100, E2100, E3100 manual A-2

ADDRESS/INTERRUPT TABLES

Table A-2. Commonly Used PC Interrupts

IRQ	Interrupt Usage	Machine Type
IRQ2	Reserved	PC
IRQ2	Cascade from slave 8259A PIC	AT, PS/2
IRQ3	Serial communications (COM2)	PC, AT, PS/2
IRQ4	Serial communications (COM1)	PC, AT, PS/2
IRQ5	Fixed disk	PC
IRQ5	Parallel printer (LPT2)	AT
IRQ6	Floppy disk	PC, AT, PS/2
IRQ7	Parallel printer (LPT1)	PC, AT, PS/2
IRQ9	Software diverted to IRQ2	AT, PS/2
IRQ10	Reserved	AT, PS/2
IRQ11	Reserved	AT, PS/2
IRQ12	Reserved	AT
IRQ12	Mouse	PS/2
IRQ14	Fixed-disk controller	AT, PS/2
IRQ15	Reserved	AT, PS/2

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