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Path: utzoo!utgpu!water!pabuhr
From: pabuhr@water.UUCP
Newsgroups: comp.emacs
Subject: Half Duplex Editor
Message-ID: <1026@water.UUCP>
Date: Tue, 7-Jul-87 07:57:19 EDT
Article-I.D.: water.1026
Posted: Tue Jul  7 07:57:19 1987
Date-Received: Thu, 9-Jul-87 00:38:33 EDT
Reply-To: pabuhr@water.UUCP ()
Distribution: world
Organization: U. of Waterloo, Ontario
Lines: 31

> Article 1238 of comp.emacs:
> Path: water!watmath!clyde!rutgers!ames!ucbcad!ucbvax!LF-SERVER-2.BBN.COM!jr
> From: jr@LF-SERVER-2.BBN.COM (John Robinson)
> Newsgroups: comp.emacs
> Subject: Re: 9600 baud problems (was Re: when using termcap, get it right!)
> Date: 6 Jul 87 15:22:59 GMT
> Sender: daemon@ucbvax.BERKELEY.EDU
> ...
> I wonder if anyone has ever made an intensely interactive application
> like emacs work over a half-duplex line!

I am not sure if this is actually what you were are looking for, but
at the University of Manitoba (Canada), they modified the rom code for
a DT80 terminal to support a powerful full screen editor at
half-duplex. The terminal was a line based editor, that is, you could
make changes to a line on the screen and when you moved off the line
it would be transmitted to the host for insertion in the file.  It was
not as powerful as Emacs (but not that far away either) and
considering it was half-duplex and connected to an Amdahl mainframe,
it was pretty impressive.  As well, it had most of the operations on
the number pad by being able to use the shift key with each number pad
key. Each number pad key had a function (eg. next word) and shift that
key usually did the reverse (eg. previous word).  With fingers on the
function pad and thumb on the shift key, it was possible to perform
editing operations very quickly. If you would like more information I
suggest you contact either:

   Eugene Reimer : ereimer@UOFMCC.bitnet
   Bill Reid     : reid@UOFMCC.bitnet

They have some documentation that they might be willing to send you.