Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!ut-emx!mic
From: mic@ut-emx.UUCP (Mic Kaczmarczik)
Newsgroups: comp.windows.x
Subject: Re: xterm 4014/vt102 mode switch escapes
Summary: <ESC>[?38h and <ESC><CTRL-C> work
Keywords: xterm,4014,vt102,mode,escape sequence
Message-ID: <17983@ut-emx.UUCP>
Date: 4 Sep 89 04:18:56 GMT
References: <2501BB78.3FF9@marob.masa.com>
Reply-To: mic@emx.utexas.edu (Mic Kaczmarczik)
Organization: UT Austin Computation Center, Unix/VMS Services
Lines: 53

In article <2501BB78.3FF9@marob.masa.com> samperi@marob.masa.com (Dominick Samperi) writes:
>It is pointed out in the xterm man page that one can switch modes between
>vt102 and 4014 by means of escape sequences, but there is also a comment
>about the xterm man page being too long to include a description of these
>escape sequences. There is a pointer to a document named "Xterm escape
>sequences," but I have not been able to locate any such document in the
>X11R3 distribution. Would somebody please let me know where I can find
>documentation on the mode-switching escape sequences? What I would like
>to do is run an application where all user interaction takes place in
>the vt102 window, except that graphs are drawn in the 4014 window.
>
>Thanks!
>
>Dominick Samperi
>Citicorp
>uunet!ccorp!samperi

There is still no such document for the X 11 xterm, but one afternoon
I figured out some Tektronix/VT switch sequences by rooting through
the sources, and you're more than welcome to what I found.  The tables
used for parsing escape sequences are pretty hairy, so I may have just
lucked onto the ones I found, but they do work. 

This escape sequence flips to the Tektronix window from VT102 mode:
	<ESC>[?38h

where <ESC> is the normal escape character (ASCII 27) and the rest of
the characters are literal, for a total of 6 characters. 

This escape sequence moves the cursor back to the VT102 window from
the Tek window:
	<ESC><CTRL-C>

(where <CTRL-C> is ASCII 3), for a total of 2 characters.

For example, I use the following C-shell aliases to move between the
Tek and VT100 windows interactively.  The funkiness with the TR
command is just so I don't imbed non-printable characters in my
.cshrc. 

	alias seltek	'echo -n "E[?38h" | tr E \\033' # xterm Tek window
	alias selvt	'echo -n "EC" | tr EC \\033\\003' # xterm VT102 window

Here's hoping this helps,

Mic Kaczmarczik

-- 
Mic Kaczmarczik					   Internet: mic@emx.utexas.edu
Unix/VMS Services 				   BITNET: MIC@UTAIVC
UT Austin Computation Center			   THEnet: UTAIVC::MIC

     Don't worry about life, son. It ain't nohow permanent.  -- Walt Kelly