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Newsgroups: comp.os.386bsd.questions
Path: sserve!newshost.anu.edu.au!munnari.oz.au!bunyip.cc.uq.oz.au!s1.elec.uq.oz.au!raboczi
From: raboczi@s1.elec.uq.oz.au (Simon Raboczi)
Subject: Putting a com port at IRQ2
Message-ID: <raboczi.741938267@s1.elec.uq.oz.au>
Summary: How can the 4th com port IRQ be changed from 9 to 2?
Keywords: com port
Sender: news@bunyip.cc.uq.oz.au (USENET News System)
Nntp-Posting-Host: s3.elec.uq.oz.au
Organization: Prentice Centre, University of Queensland
Date: Tue, 6 Jul 1993 05:57:47 GMT
Lines: 17
I have a four port serial board with 3 16450 UARTs and a single
16550. The IRQ lines for each are selectable in the range 2-5.
Operating the com ports off of lines 3-5 works fine, but IRQ 2
has been forcibly moved to IRQ 9, judging from what I see in
/sys/i386/isa/icu.h . My kernel has the NFS, ISOFS, ethernet
and scsi parts excluded, so I don't think there's anything
else using IRQ 2.
Q1: Is there a good reason IRQ 2 shouldn't be used?
Q2: If not, how can I put a com port at IRQ 2?
--
,-_|\ Simon Raboczi (raboczi@s1.elec.uq.oz.au)
/ * Department of Electrical & Computer Engineering
\_.--_/ University of Queensland, St Lucia
v Brisbane, Australia