IBM RS/6000 7043 43P manual DMA-Channel Assignments, IRQ Assignments, Appendix C, Irq

Appendix C.

IRQ

and DMA-Channel Assignments

This

appendix

lists the interrupt-request (IRQ) and

direct-memory-acc

(DMA)-channel

assignments

for

your system unit

for the

Model

140

and

Note:

If

you

install ISA adapters in your

Model

140

or

Model

240

sure that no interrupts or DMA channels conflict

with

existing

r

example,

do not

set

an

ISA adapter

to use

interrupt

(IRQ)

6

used

by

the diskette

drive.

IRQ Assignments

The following table shows the interrupt-request assignments.

IRQ	Description
0	Interval		timer
1	Keyboard
2	Cascade from controller 2 (Not available)
3	Serial	port		2
4	Serial	port		1
5	Available for ISA bus if not used for audio
6	Diskette		drive
7	Parallel port 1 or Audio
8	Real-time		clock
9	Available		for		ISA	bus
10	Available		for		ISA	bus
11	Available		for		ISA	bus
12	Available		for ISA bus if not used for mouse
13	Scatter		Gather
14	Available		for		ISA	bus
15	Available		for		ISA	bus if not used for tablet port

 Copyright IBM Corp. 1996, 1998 C-1