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Newsgroups: comp.os.386bsd.questions
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!bruce.cs.monash.edu.au!maurice
From: maurice@bruce.cs.monash.edu.au
Subject: Re: SIO/COM driver 16550A limitations?
Message-ID: <1994Jul4.130216.19263@bruce.cs.monash.edu.au>
Organization: Computer Science, Monash University, Australia
Date: Mon, 4 Jul 1994 13:02:16 GMT
Lines: 30
From article <2v1kdv$qal@lastactionhero.rs.itd.umich.edu>, by pha@umich.edu (Paul Anderson):
> I just installed FreeBSD 1.1.5R (what a phenomenal job, folks).
>
> The man pages for SIO and COM both allude to problems with cheap
> clone 16550A serial boards (which I have). What is the failure
> mode for these? When I do: "cat </dev/tty00" on a stock system,
> the consoles freeze (no keystrokes do anything), and it appears
> that the system goes dead (I don't actually know what the CPU
> is doing, since I have no bus analyzer).
>
Before concluding that your serial card is at fault use kermit to
try and set the line. If your system does not quickly respond
try the following:
/bin/stty -f /dev/tty00 clocal
Then try to use kermit to verify the presence of a serial device.
If kermit responds quickly to the set line command add the line to your
/etc/rc.local file to ensure the convenient operation of the serial port
each time you boot.
Maurice
--
Maurice Castro | "In hardware engineering, Ohm's
maurice@bruce.cs.monash.edu.au | law and Maxwell's equations pale
| in importance and influence next
| to Murphy's Law" Gordon Bell