Path: utzoo!mnetor!uunet!husc6!ut-sally!utah-cs!utah-gr!uplherc!sp7040!wsccs!terry
From: terry@wsccs.UUCP (terry)
Newsgroups: comp.sys.amiga
Subject: Re: Wish list for VT100 R > 2.8
Message-ID: <310@wsccs.UUCP>
Date: 12 Mar 88 10:28:47 GMT
References: <9021@sunybcs.UUCP> <10599@ut-sally.UUCP>
Lines: 51
Summary: Fortunately :-)

In article <10599@ut-sally.UUCP>, bryan@rodan.cs.utexas.edu (Bryan Bayerdorffer) writes:
> 	Unfortunately, in full duplex mode there's no way to distinguish
> between echoed characters and characters originating at the other machine.

	Fortunately, a full duplex terminal _only_ transmits characters to
the other end, and only displays characters transmitted to it, _not_ echoing
them back down the line:

	keyboard   ------->    screen
	screen     <-------    keyboard

The problem described is either the result of half duplex operation:
(sent to their screen and my screen)

	keyboard   ------->    screen
	   |                      ^
           v                      |
	screen     <-------    keyboard

or talk-mode (echoplex) operation:
(send to their screen and echoed back to my screen)

	keyboard   -------> +-->   screen
	                   /  ^
                    /------  /
                    v /------
        screen     <--+ <-------   keyboard

> What's needed is some kind of protocol to separate the two.  I think adding
> yet another feature like this to vt100 would be a wasted effort.

	Correct on both counts.  The first from an implimentation standpoint,
the second from the "pick up the phone and say it" standpoint, since it's
not going to be able to do anything else at the time anyway.

> A much better idea would be a 'talk' client/server pair for DNET.

	Good idea.  If anybody would get off their laurels and release DNET to
us, I am sure an implimentation could be done here in a very short period of
time, as well as a VMS port, an Atari (the 'A' word) ST port, and an IBM PC
port.  People could even get college credit for it!

	As of yet, we have still to see this mythic monster, DNET.


| Terry Lambert           UUCP: ...!decvax!utah-cs!century!terry              |
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