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Computer Addresses and Interrupts

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These are the common computer addresses and interrupts used on personal computers.  

DEVICE ADDRESS INTERRUPT
COM1 3F8h IRQ4
COM2 2F8h IRQ3
COM3 3E8h IRQ4
COM4 2E8h IRQ3
LPT1 378h IRQ7
LPT2 278h IRQ5
Floppy Disk 3F0h IRQ6
Real Time Clock   IRQ8
Redirected to IRQ2   IRQ9
Math Coprocessor 0F0h IRQ13
Hard disk 1F0h IRQ14

 

IBM pc compatible computer addresses and interrupts ports com1 com2 com3 com4 lpt1

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