From owner-freebsd-hardware  Wed Mar 27  3:59:20 2002
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Date: Wed, 27 Mar 2002 22:59:44 +1100 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: Aditya <aditya@grot.org>
Cc: freebsd-hardware@FreeBSD.ORG
Subject: Re: serial console vs. serial terminal
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On Tue, 26 Mar 2002, Aditya wrote:

> [Lots deleted...]
> So what is it about explictly setting sio0 to be the console that changes the
> serial line discipline? Connecting with a regular null modem cable seems to be
> unaffected in either case.

The relevant difference is probably that clocal is turned on and locked
on for the console.  clocal makes some modem control signals unnecessary.
Null modem cables aren't standard enough to always fake all the necessary
control signals like the driver wants.

Bruce


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