Path: utzoo!utgpu!news-server.csri.toronto.edu!helios.physics.utoronto.ca!ists!gkcl!aronb
From: aronb@gkcl.ists.ca (Aron Burns)
Newsgroups: comp.unix.sysv386
Subject: Re: RTS/CTS (was re: Help Telebit and SCO RTS/CTS Setup)
Keywords: RTS/CTS Hardware Flow Telebit RS-232 Unix 386 SCO
Message-ID: <21301@ists.ists.ca>
Date: 9 Apr 91 16:26:53 GMT
References: <1991Apr5.230009.16835@netcom.COM> <LVQPHKW@geminix.in-berlin.de> <1991Apr7.024322.4465@netcom.COM> <1991Apr8.173125.22219@mccc.edu>
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Reply-To: aronb@gkcl.UUCP (Aron Burns)
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In article <1991Apr8.173125.22219@mccc.edu> pjh@mccc.edu (Pete Holsberg) writes:
>at various speeds and published the results.  They said that at higher
>transfer rates (57.6K and 115.2K), they used RTS/CTS handshaking because
>(I'm paraphrasing) that's what you had to use when you had high speed

Many devices don't respond quickley to an XOFF request, so the 
buffer on the requesting device overflows with resultant data loss.
This is particularly true of the UART built in to microcomputers.

Some smart i/o cards respond to XOFF quickly enough to 
do software flow control at high data rates.  The modem 
also has to respond quickly.  If it all works, you can save
some money on cabling :-).


Aaron Burns      	     "Nothing I say on the net is binding
aronb@gkcl.ists.ca         to our corporation"
Toronto, Ontario         "Life is a forge, and the purest metal
(416)438-6650 x317        comes from the hottest fire"