Path: utzoo!attcan!uunet!tank!phd_ivo@gsbacd.uchicago.edu
From: phd_ivo@gsbacd.uchicago.edu
Newsgroups: comp.emacs
Subject: Re: Need Help with GNU Emacs, VT131, and VMS (!)
Message-ID: <2240@tank.uchicago.edu>
Date: 11 Mar 89 20:16:33 GMT
Sender: news@tank.uchicago.edu
Distribution: comp.emacs, comp.os.vms
Organization: University of Chicago Graduate School of Business
Lines: 38

>Second problem: I got around (temporarily) this problem by setting the VT131
>to VT100 (i.e. SET TERM/VT100).  This allows me to use the emacs, but whenever
>the screen scrolls, I get this horrible mess in the minibuffer:
> 
>Failing I-search:^S^S^S^Q-
> 
>Once I got    Failing regexp I-search: OB^S^Q-   
>...   I should
>point out that the terminal line runs through a GANDALF multiplexer before
>getting to the terminal, I don't know if that does anything with control chars.
> 
>Final problem (yeah, I know I only said two): I can't get control-S!  VMS
>uses control-s to tell the process "stop sending data, you ugly beast."  So
>when I type c-x c-s, emacs just sits there forever, waiting for me to type
>control-q so it can send data again.
> 

I am neither a GNU, nor a VMS expert. In addition, we are running an old
version of GNU emacs here. However, your symptoms look familiar to me.
^S and ^Q were two unfortunate choices for control character usage, since
it just asks for all sort of problems.

First, we run an ethernet server here, and when I want to make it pass ^S
^Q through to the terminal (yes our server traps it; switch off with "set
flow disabled"), and I resume my session, I get a ^S ^Q sequence passed
to my process, resulting in emacs waiting for a quoted search.

Second, at least our vms doesn't trap ^S/^Q, but leaves it to our server.
There are some witches of interest, though, like "set terminal/nottsync",
which control vms behavior.

Finally, vt100 themselves may trap ^S/^Q, and you may have to set your
terminal to not freeze the display on itself. Usually, that's called
xon/xoff or flow control, if I am not mistaken.

So, the missing vt131/100 termcap entry may be your least problem.

ivo welch	phd_ivo@gsbacd.uchicago.edu