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Date:      Sat, 12 Jan 2002 15:25:54 -0800
From:      "Kevin Oberman" <oberman@ptavv.es.net>
To:        Dan Nelson <dnelson@allantgroup.com>
Cc:        leegold <leegold@operamail.com>, freebsd-questions@FreeBSD.ORG
Subject:   Re: what does my dmesg say? 
Message-ID:  <20020112232554.472BB5D13@ptavv.es.net>
In-Reply-To: Your message of "Fri, 11 Jan 2002 23:05:15 CST." <20020112050515.GB24649@dan.emsphone.com> 

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> Date: Fri, 11 Jan 2002 23:05:15 -0600
> From: Dan Nelson <dnelson@allantgroup.com>
> Sender: owner-freebsd-questions@FreeBSD.ORG
> 
> In the last episode (Jan 11), leegold said:
> > Below is a copy of my dmesg. It's from an ibm aptiva that I pulled
> > all the stock cards out of and put an isa hardware modem into.
> > 
> > First could you comment on the modem, is
> > it detected? I think I see something going on
> > sio (?)
> 
> > sio0: configured irq 4 not in bitmap of probed irqs 0
> > sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
> > sio0: type 8250
> > sio1 at port 0x2f8-0x2ff irq 3 on isa0
> > sio1: type 16550A
> 
> sio0 is most likely your modem, but it must be an ancient one to be a
> plain 8250.  You can test by running "cu -l /dev/cuaa0" and see if an
> "ATZ" gives you "OK" back.  If not, try /dev/cuaa1.

The key is the first line:
sio0: configured irq 4 not in bitmap of probed irqs 0

This really means that BIOS need to be used to enable the port. Until
then, it will simply not work. Since this is an IBM computer, you may
need a DOS utility to enable the port, but my only experience with
IBMs of newer vintage than the AT is with laptops.

It turns out that when the serial driver (if_sio) can't talk to the
device, it labels it as an 8250. I really, really will write a patch
to correct this soon, although it's too late to make 4.5. Sorry.

R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634

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