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Date: Tue, 20 May 1997 23:50:53 -0400
From: "Gary T. Corcoran" <garycorc@idt.net>
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To: Dan Welch <WELCHDW@wofford.edu>
CC: TRUTH::WELCHDW@wofford.edu, HARDWARE@FreeBSD.ORG
Subject: Re: isa bus and boca multiport boards
References: <970520225720.22a2107f@wofford.edu>
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Dan Welch wrote:
> 
> This is the reply I gave to Brett Glass but forgot to cc to the list:
> ======================
> > Don't know, but sounds like a case of partial address decoding on
> > the board -- and/or port, address, or IRQ conflicts.
> 
> I agree.
>
> Here's the kernel incantation from the current test machine:
...
> device  sio17   at isa? port 0x278 tty flags 0x1105 irq 12 vector siointr
> 

I/O ports 0x278-0x27F are standard for an LPT (parallel) port.
In addition, port 0x279 is used for Plug-N-Play setup.
And, IRQ 12 is used for PS/2 mouse ports built into motherboards.

Any of those resources ring a bell with your system?

Gary