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000441_news@columbia.edu_Wed Sep 27 02:13:50 1995.msg
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From: jrd@cc.usu.edu (Joe Doupnik)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Escape-Code Problem
Message-Id: <1995Sep27.081350.62112@cc.usu.edu>
Date: 27 Sep 95 08:13:50 MDT
References: <4497a5$6sv@n.ruf.uni-freiburg.de>
Organization: Utah State University
Lines: 24
Apparently-To: kermit.misc@watsun.cc.columbia.edu
In article <4497a5$6sv@n.ruf.uni-freiburg.de>, gartmann@immunbio.mpg.de (Christoph Gartmann) writes:
> Hello,
>
> we use a software remotely via Kermit & TCP-IP. This software recognizes
> the Escape-key (and character) and associates the function "one level back"
> to it. On the other hand the terminal emulation (Kermit VT220) uses escape
> sequences for cursors keys (e.g. <ESC>[B for cursord-down). Now this software
> (yes, it does support a VT220) has to distinguish between a single escape
> and an escape that is part of an escape sequence. Obviously this is done via
> the delay between the bytes. And if the line is a bit slow you don't have
> the cursor keys anymore :-( Thus, is there a way to tell Kermit that it will
> send escape sequences in a single packet or something the like? I agree, this
> is not a problem of Kermit but of the remote software (no way to disable the
> escape key or remap it). But perhaps Kermit can offer a way to get around
> this problem?
----------
Kermit for which operating system and machine??
MS-DOS Kermit does group bytes corresponding to single key presses.
Please do note that TCP/IP Telnet full duplex connections have no concept of
records and unit delivery; it's a data stream. IP packets hold as much as the
protocol stack wants to send at that time and the time between packets is not
tied to the data. The Emacs-like ESC versus escape sequence timing gimmick
fails on long distance links because timing is not tightly controlled.
Joe D.