IRQ ASSIGNMENTS Flashcards
IRQ ADDRESS TO DEVICE
1
Q
IRQ 0
A
System Timer
2
Q
IRQ 1
A
Keyboard
3
Q
IRQ 2
A
Open (cascade to IRQ 9)
4
Q
IRQ 3
A
Default for Com 2 and Com 4
5
Q
IRQ 4
A
Default for Com 1 and Com 3
6
Q
IRQ 5
A
Lpt2
7
Q
IRQ 6
A
Floppy Drive
8
Q
IRQ 7
A
Lpt1
9
Q
IRQ 8
A
Real-time Clock
10
Q
IRQ 9
A
Redirect to 2
11
Q
IRQ 10
A
Open
12
Q
IRQ 11
A
Open
13
Q
IRQ 12
A
Open (often used with PS/2 mouse)
14
Q
IRQ 13
A
Math Coprocessor
15
Q
IRQ 14
A
Primary hard drive controller
