Lenovo PC 300GL Technical Information Manual 6272, 6282 - Page 62

Appendix C., IRQ and DMA Channel Assignments

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Appendix C. IRQ and DMA Channel Assignments Appendix C. IRQ and DMA Channel Assignments The following figures list the interrupt request (IRQ) and direct memory access (DMA) channel assignments. Figure 52. IRQ Channel Assignments IRQ System Resource NMI Critical system error SMI System/power management interrupt 0 Reserved (internal timer) 1 Reserved (keyboard) 2 Reserved (cascade interrupt from slave) 3 Serial port 2 4 4 Serial port 1 4 5 Parallel port 2 4 6 Diskette controller 4 7 Parallel port 1 4 8 Reserved (real-time clock) 9 Video adapter 4 10 ISA/PCI bus 11 ISA/PCI bus 12 Mouse port 4 13 Reserved (math coprocessor) 14 IDE Channel 1 4 15 IDE Channel 2 4 4 If not assigned, this resource is available for the ISA/PCI bus. 50 © Copyright IBM Corp. October 1997

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Appendix C.
IRQ and DMA Channel Assignments
Appendix C.
IRQ and DMA Channel Assignments
The following figures list the interrupt request (IRQ) and direct memory access (DMA) channel
assignments.
Figure 52. IRQ Channel Assignments
IRQ
System Resource
NMI
Critical system error
SMI
System/power management interrupt
0
Reserved (internal timer)
1
Reserved (keyboard)
2
Reserved
(cascade interrupt from slave)
3
Serial port 2
4
4
Serial port 1
4
5
Parallel port 2
4
6
Diskette controller
4
7
Parallel port 1
4
8
Reserved (real-time clock)
9
Video adapter
4
10
ISA/PCI bus
11
ISA/PCI bus
12
Mouse port
4
13
Reserved (math coprocessor)
14
IDE Channel 1
4
15
IDE Channel 2
4
4
If not assigned, this resource is available for the ISA/PCI bus.
50
Copyright IBM Corp. October 1997