Appendix E. Interrupt Request And Direct Memory Access Channel Assignments - Lenovo NetVista A40p User Manual

Appendix E. Interrupt request and direct memory access
channel assignments
The following tables list the IRQ and DMA channel assignments.
Note: The default settings for COM 1 (IRQ 4), COM 2 (IRQ 3), and LPT 1 (IRQ 7)
© Copyright IBM Corp. 2000
Table 4. IRQ channel assignments
IRQ System resource
NMI Critical system error
SMI System-management interrupt for power management
0 Timer
1 Keyboard
2 Cascade interrupt from slave PIC
3 COM2 (some models only)
4 COM1
5 LPT2/audio (if present)
6 Diskette controller
7 LPT1
8 Real-time clock
9 Video, ACPI
10 MIDI/joystick (some models only)
11 Available to user
12 Mouse port
13 Math coprocessor
14 Primary IDE (if present)
15 Secondary IDE (if present)
can be changed to another IRQ.
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