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Date:      Tue, 18 Jun 2002 14:11:05 -0700
From:      "Aaron Burke" <aburke@nullplusone.com>
To:        "FreeBSD-Questions" <freebsd-questions@freebsd.org>, "djf2" <djf2@danu.ili.net>
Subject:   RE: Serial console issues
Message-ID:  <NGBBLCIHCLNJAIGIFFHJOEHDCFAA.aburke@nullplusone.com>
In-Reply-To: <Pine.BSI.4.05L.10206181642110.20434-100000@danu.ili.net>

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<snip>
> > I've been having the same problem. I tried everything I could think
> > of. The only other thing I can think of to try is to use a different
> > terminal program. However, since I can use ssh to get into the box, I
> > don't worry too much about a 9600 baud serial console. It's
> > irritating, but not hugely so.
> >
> > I suppose it could also be related to the ancient motherboard my
> > headless box runs on. It's an old 486 DX2/66 and may not do well at
> > higher COM port speeds.
> >
> > Regards,
> >
> > Corey Snow
> >
>
>      It might not be your hardware.  Judging by the lack of any real
> available info, I don't think its possible to increase the speed on the
> serial port.  I guess its not too big of a deal, so that might be why.

Then again it might be related to your hardware. I remember the days of
the 486. I had some boards with onboard 8250 UARTS, some with
16450 UARTS, and Some with an external 16550 UART. The type of uart is
going to be good info to know. If your using an 8250 then 9600 (I think)
is the max you will get out of the port. If you have a 16450, you can
get about 19200 (not 100% sure on this one) from the controller. And if
your lucky enough to have a 16550 UART, then you can get speeds up to
230,400 bps. This is all going to depend on the serial controller.

You should be able to use "dmesg | grep sio" to determine what kind of
hardware
you are running.

<snip>


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