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Date: Tue, 5 Dec 2000 10:03:59 -0600 (CST)
From: Chad Schwartz <cwslist@main.cornernet.com>
To: Jon Burgess <Jon_Burgess@eur.3com.com>
cc: Steve Hill <steve@navaho.co.uk>, PaulJakma <paulj@itg.ie>,
        <linux-kernel@vger.kernel.org>
Subject: Re: Serial Console
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See, in an ideal world, that shouldn't be the case, at all.

Since we're NOT operating under the assumption that the serial console is
a modem, we should be - instead - operating under the assumption
that it is a 3-wire NULL connection. (thus, making NO assumptions about
the user's hardware..)

If the user wants to ADD RTS/CTS flow control or DCD based state checking
as an OPTION, well, hey.  whatever. Pick your poison.  But i sure as hell
wouldn't do it that way.

Chad

> Lilo 'append="console=ttyS0"' and it boots fine without a connection to the
> serial port without having to do any specific manipulation of the flow control.
> I think that all serial output is dumped to /dev/null if DCD is not asserted no
> matter what the flow control says. Perhaps there are some hardware differences
> in the configuration of the control signal pull-up/downs.
>
>      Jon Burgess
>
>
>
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