Appendix c. irq and dma channel assignments – IBM PC 300GL User Manual
Page 60
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© Copyright IBM Corp. 2000
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Appendix C. IRQ and DMA channel assignments
The following tables list the interrupt request (IRQ) and direct memory access (DMA
channel assignments.
Table 36. IRQ channel assignments
IRQ
System resource
NMI
Critical system error
SMI
System management interrupt - power management
0
Reserved (interval timer)
1
Reserved (keyboard)
2
Reserved, cascade interrupt from slave PIC
3
COM2
4
COM1
5
LPT2/audio (if present)
6
Diskette controller
7
LPT1
8
Real-time clock
9
ACPI
10
Available to user
11
Available to user
12
Mouse port
13
Reserved (math coprocessor)
14
Primary IDE (if present)
15
Secondary IDE (if present)
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