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From: ridder@elvira.enet.dec.com (Hans Ridder)
Newsgroups: comp.sys.amiga.datacomm
Subject: Re: Handshake 2.20c questions
Message-ID: <3340@shodha.enet.dec.com>
Date: 10 Jun 91 17:30:45 GMT
References: <1991Jun6.030522.3061@ecsvax.uncecs.edu> <2969@public.BTR.COM> <1991Jun8.212156.1663@dayton.saic.com> <2996@public.BTR.COM> <2997@public.BTR.COM>
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Organization: Digital Equipment Corporation, Customer Support Center
Lines: 38

In article <2997@public.BTR.COM> thad@public.BTR.COM (Thaddeus P. Floryan) writes:
>In article <2996@public.BTR.COM> thad@public.BTR.COM (Thaddeus P. Floryan) writes:
>>I have "real" DEC VT100, DEC VT102, DEC VT220, and DEC VT340 terminals at my
>>office and can see how they are definitely braindamaged.
>
>What I meant by that statement is that if the terminal is IN, say, VT100 mode,
>then that is how the terminal should report itself.

Agreed.

>If the user wants to be in VT100 mode, an application (or operating system)
>shouldn't second-guess the user's intents, especially if the user is coming
>in over a network from a system that still thinks the user is on a VT100 but
>when the user returns to the first system the terminal was "gratuiously" set
>by VMS to a VT200 which now breaks applications on the first system which
>still believes the terminal to be in VT100 mode.   (Huh?  :-)

What's actually happening here is that when VMS hears that the terminal
is, say a VT220, it sends a sequence to tell the terminal to go into
"Level 2, 7 bit controls" mode (or I think "Level 2, 8 bit controls" if
the terminal port is set to "8 bits".)  It's mostly interested in the
7-bit/8-bit part to make sure the terminal and the system have the same
idea about how many bits to use.  This has the unfortunate side effect
of changing you to VT220 mode...

>The "SET TERM/INQUIRE" shouldn't alter the user's preferences as it presently
>does.

Just to be sure no one missed this, if set to VT100 mode *and* VT100 ID,
then SET TERM/INQUIRE doesn't mess with your preferences.

>Thad Floryan [ thad@btr.com (OR) {decwrl, mips, fernwood}!btr!thad ]


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  Hans-Gabriel Ridder			Digital Equipment Corporation
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