45
IRQ Mapping Chart
IRQ
FUNCTION IRQ
FUNCTION
IRQ0 System Timer
IRQ8 RTC Clock
IRQ1 Keyboard
IRQ9 Unused
IRQ2 Cascade to IRQ Controller
IRQ10 Unused
IRQ3 COM2
IRQ11 Unused
IRQ4 COM1
IRQ12 PS/2 mouse
IRQ5 Unused
IRQ13 FPU
IRQ6 FDC
IRQ14 Primary IDE
IRQ7 Printer
IRQ15 Compact Flash
DMA Channel Assignments
CHANNEL FUNCTION
0
Available
1
Available
2
Floppy Disk (8-bit transfer)
3
Available
4
Cascade for DMA controller 1
5
Available
6
Available
7
Available