Table of Contents
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SYSTEM INTERRUPTS (IRQS)
IRQ
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
DMA CHANNEL ASSIGNMENTS
Channel
0
1
2
3
4
5
6
7
Description
System Timer
Keyboard
Cascade to IRQ Controller
COM2/COM4
COM1/COM3
Unused
Floppy Drive (FDC)
Printer
Real Time Clock
Unused
Unused
Unused
PS/2 Mouse
FPU
Primary IDE
Secondary IDE
Function
Available
Available
Floppy disk ( 8-bit transfer )
Available
Cascade for DMA Controller 1
Available
Available
Available
Board Configuration
24
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