IBM NetVista Technical Information Manual

© Copyright IBM Corp. 2000 49
Appendix C. IRQ and DMA channel assignments
The following figures 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) can
be changed to another IRQ.
Table 35. 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)
4COM1
5 LPT2/audio (if present)
6 Diskette controller
7LPT1
8Real-time clock
9Video, ACPI
10 MIDI/joystick (A20 models only)
11 Available to user
12 Mouse port
13 Math coprocessor
14 Primary IDE (if present)
15 Secondary IDE (if present)
Table 36. DMA channel assignments
DMA channel Data width System resource
0 8 bits Open
1 8 bits Open
2 8 bits Diskette drive
3 8 bits Parallel port (for ECP or EPP)
4 Reserved (cascade channel)
5 16 bits Open
6 16 bits Open
7 16 bits Open

IBM NetVista Specifications

General

Category	Desktop
Model	NetVista
Processor Type	Intel Celeron
Memory Type	SDRAM
Optical Drive	CD-ROM, DVD-ROM, or CD-RW
Graphics	Integrated Intel graphics
Audio	Integrated audio
Network	10/100 Ethernet
Operating System	Windows 2000, Windows XP (Varies by model)
Expansion Slots	PCI
Ports	USB, serial, parallel, VGA, audio in/out