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From: Jan Isley <jan@bagend.atl.ga.us>
Message-Id: <199507261702.NAA00284@bagend.atl.ga.us>
Subject: Re: Problems installing a serial card...
To: moore@WOLFE.net (Timothy Moore)
Date: Wed, 26 Jul 1995 13:02:57 -0400 (EDT)
Cc: questions@freebsd.org
In-Reply-To: <199507260632.XAA22565@gonzo.wolfe.net> from "Timothy Moore" at Jul 25, 95 11:32:28 pm
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Change the IRQ and addresses on the card to what DOS wants.  Really,
there is way too much history behind these to mess with them.

/sbin/dmesg | grep ^sio

sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A

Timothy Moore wrote:
> This must be pretty basic PC stuff, but I'm fairly new to PCs, so bear
> with me.  I'm trying to add a "hi-speed" serial card with two ports to
> a 486 ISA system running FreeBSD.  The card allows setting of IRQs via
> jumpers on the card, as well as base addresses. .  I chose 10 and 11
> for these ports which are supposed to be sio2 and sio3.  FreeBSD
> doesn't recognize that the com ports are there, though I changed the
> irq for sio{2,3} via kernel -c.  I reluctantly booted up DOS and ran
> msd, which shows all 4 com ports (and identifies the different uart
> chips correctly), but shows the ports sharing IRQs 4 and 3 (which is
> common in the DOS world, I am told).