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From: ridder@elvira.enet.dec.com (Hans Ridder)
Newsgroups: comp.sys.amiga
Subject: Re: GNU Emacs help request
Message-ID: <1865@shodha.enet.dec.com>
Date: 23 Oct 90 15:38:48 GMT
References: <2789@ns-mx.uiowa.edu>
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Distribution: usa
Organization: Digital Equipment Corporation, Customer Support Center
Lines: 32

In article <2789@ns-mx.uiowa.edu> bheil@umaxc.weeg.uiowa.edu (Brian Heil) writes:
>Hi guys,
>  Can anybody give me help with GNU Emacs and VLT?  I run VLT in
>interlaced/ custom screen with 43 lines and when I exit emacs I get
>reset to 24 lines.

This is a pet peve of mine....  Dunno how to fix this in GNU Emacs, but
I know why it's happening (I fixed it in TOPS-20 Emacs, and many other
programs.)  It's caused by using the wrong escape sequence to clear the
scroll region.

GNU Emacs is probably using <ESC>[1;24r which *sets* the scroll region
to lines 1 to 24.  This works fine on 24 line terminals, but loses on
larger ones.  What should be used to *clear* the scroll region is
<ESC>[r which sets the scroll region to the default i.e. the size of the
terminal.

I once hacked an old version of VT100 to catch requests to set the
scroll region to 1-24 and set it to the height of the window instead.
Ugly, but it worked.

If GNU Emacs uses termcap, it might be easy to change the termcap
entry.... 

>Brian Heil                           )              University of Iowa

-hans

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