Typical Pc Irq-io Address Device Assignments
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Created by James M. McBride
8/5/2009
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Typical PC IRQ I/O Address Device Assignments
IRQ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Used By Device System Clock Keyboard Cascade Com2 / Com4 Com1 / Com3 LPT2 / Sound Floppy LPT1 Real Time Clock Open Open / NIC Open / VGA PS/2 Mouse Math Coprocessor Primary IDE Secondary IDE
I/O Address 40h 60h 2F8h / 2E8h 3F8h / 3E8h 278h / 220h 3F0h 378h 70h
A000h
1F0h 170h
8/5/2009
Page 1 of 1
Typical PC IRQ I/O Address Device Assignments
IRQ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Used By Device System Clock Keyboard Cascade Com2 / Com4 Com1 / Com3 LPT2 / Sound Floppy LPT1 Real Time Clock Open Open / NIC Open / VGA PS/2 Mouse Math Coprocessor Primary IDE Secondary IDE
I/O Address 40h 60h 2F8h / 2E8h 3F8h / 3E8h 278h / 220h 3F0h 378h 70h
A000h
1F0h 170h
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