*BSD News Article 18858


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Path: sserve!newshost.anu.edu.au!munnari.oz.au!yoyo.aarnet.edu.au!myall.awadi.com.au!myall!blymn
From: blymn@awadi.com.au (Brett Lymn)
Newsgroups: comp.os.386bsd.bugs
Subject: Re: Problems with patchkit 0.2.4
Date: 25 Jul 1993 08:06:59 GMT
Organization: AWA Defence Industries Pty. Ltd.
Lines: 31
Message-ID: <BLYMN.93Jul25173659@siren.awadi.com.au>
References: <1993Jul15.070541.27917@cnplss5.cnps.philips.nl> <224in8$fl0@acsc.com>
	<CAAEBo.LFF@cyb.cojones.com> <1993Jul20.012738.2952@fcom.cc.utah.edu>
	<CAHvz0.38s@cyb.cojones.com>
NNTP-Posting-Host: siren.awadi.com.au
In-reply-to: loodvrij@cyb.cojones.com's message of Wed, 21 Jul 1993 03:20:45 GMT

>>>>> On Wed, 21 Jul 1993 03:20:45 GMT, loodvrij@cyb.cojones.com (Bruce 'Loodvrij' Keeler) said:

Bruce> In article <1993Jul20.012738.2952@fcom.cc.utah.edu> terry@cs.weber.edu (A Wizard of Earth C) writes:
>In article <CAAEBo.LFF@cyb.cojones.com> loodvrij%cyb@fredbox.cts.com writes:
>[ ... nullmodem cables ... ]

[lotsa good rs-232 stuff elided]

>My advice is to avoid cts/rts wherever possible and to tie it in the cable
>hood without a connection between the two machines.  If you *must* have
>it because you are using equipment which lies to you in their "rated speeds"
>column, then be sure your driver expects the default behaviour and not the
>documented behaviour of these lines.

Bruce> OK, so I'll kill rts/cts for now, then?

It would not hurt but then again if the flow control is not being
used, why should it make any difference?

Bruce>  But if I get a high speed modem
Bruce> (I'm saving up for a Telebit WorldBlazer right now) I guess I'll have to
Bruce> use it.  Does 'making sure the driver expects the default behaviour' mean
Bruce> doing a 'stty crtscts' or whatever?

In this case you definitely need the flow control because the data you
pump at the modem may not be uniformly compressible so you can overrun
the modem.  Use either stty crtscts or get a slattach that sets this
for you.

--
Brett Lymn