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From: pmh@pilhuhn.de (Patrick M.Hausen)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: can't find modem...
Date: 28 Sep 1995 11:11:30 +0100
Organization: The Home Of The Pilhuhn
Lines: 29
Message-ID: <44dsci$3st@pilhuhn.pilhuhn.de>
References: <440q2d$18l@senior.nectec.or.th> <441h5e$2it@crl2.crl.com> <coveDFI72s.G6A@netcom.com> <449qkm$i7s@uriah.heep.sax.de>
NNTP-Posting-Host: pilhuhn.de
j@uriah.heep.sax.de (J Wunsch) writes:
>Cove Schneider <cove@netcom.com> wrote:
>>: Therefore you should set the modem's irq to 9 or 5, and then
>>: boot -c and set sio3 appropriately.
>>
>>Just a little note to add (if my memory serves me): If the modem
>>is using IRQ 9, then you actually need to set it to IRQ 2.
>>
>>(If I'm wrong some one please correct me..)
>You are wrong. It's IRQ2 on the ISA bus, but it's hardware-remapped
>to IRQ9 (since IRQ2 is used for the cascade PIC), and FreeBSD knows it
>by its actual name IRQ9.
If he's wrong depends on which way round the IRQs are to be read in his
statement. Just to complete the picture:
If you jumper an 8bit COM board to use IRQ 2, the you have to compile
your kernel with IRQ 9 (the erason for this is the remapping as Joerg
explained).
Paddy
--
Patrick M. Hausen Gerwigstr. 11 76131 Karlsruhe Tel. +49 721 699234
pmh@pilhuhn.sub.org s_hausen@ira.uka.de IRC: cutie
"You can fool all of the people some of the time and some of the
people all of the time, but you can't fool Mom." (Captain Penny's Law)