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IRQ Assignment Map
Interrupt Channel
NMI
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
NOTE: IRQ settings may be changed by OS
DMA Channel Assignment
DMA Channel
DRQ0
DRQ1
DRQ2
DRQ3
DRQ4
DRQ5
DRQ6
DRQ7
28
System errors
System timer
Keyboard
Programmable interrupt controller
Reserved
COM1
Reserved
Floppy
LPT1
Real time clock
SCI
Audio/Mode
USB/VGA/Cardbus
PS2 pointing device
Numeric data processor
1st IDE device (hard disk)
2nd EIDE device (CD-ROM drive)
Not used
Not used
Flopp
Not used
DMA controller
Not used
Not used
Not used
Function
Function
Chapter 1

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