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IRQ Assignments
Default Interrupt Request Assignments 0-15
16
Computer Science
Undergraduate 1
01/28/2009
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Term
IRQ 0
 Definition
System Timer - RESERVED
Term
IRQ 1
 Definition
Keyboard - RESERVED
Term
IRQ 2
 Definition
Cascaded signals from IRQs 8-15
Term
IRQ 3
 Definition
COM2 & COM4
Term
IRQ 4
 Definition
COM1 & COM3
Term
IRQ 5
 Definition
LPT2 OR Sound Card
Term
IRQ 6
 Definition
Floppy Disk
Term
IRQ 7
 Definition
LPT1 OR Sound Card
Term
IRQ 8
 Definition
Real-time Clock (RTC)
Term
IRQ 9
 Definition
OPEN
Term
IRQ 10
 Definition
OPEN
Term
IRQ 11
 Definition
OPEN
Term
IRQ 12
 Definition
PS/2 Mouse
Term
IRQ 13
 Definition
ISA / Math Co-processor
Term
IRQ 14
 Definition
Primary IDE
Term
IRQ 15
 Definition
Secondary IDE
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