Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!haven!mimsy!nocusuhs!nmrdc1!minixug!arrakis!bert
From: bert@arrakis.nl.mugnet.org (Bert Laverman)
Newsgroups: comp.os.minix
Subject: Re: 50 line screen mode (Atari).
Message-ID: <9104023054@arrakis.nl.mugnet.org>
Date: 2 Apr 91 21:11:00 GMT
References: <2987@krafla.rhi.hi.is>
Organization: Alphasoft Nederland
Lines: 46

In article <2987@krafla.rhi.hi.is>, adamd@rhi.hi.is (Adam David) wrote:
> When I press F1 in minix 1.5 the cursor jumps to the left end of whatever line
> it's in and enters 50 line mode.
If you check the generated escape codes, you'll find F1 to generate:
	^[[1~	(ESC leftbracket 1 tilde)
If you check /usr/src/kernel/stvdu.c, you'll find that:
	^[[ l;a;m;r;g;b ~
Is used for several ST specific settings. ^[[1~ happens to switch on
50 line mode (l=1), ^[[0~ will bring you back to 25 lines.

> This is useful but there are 2 problems:
> a) I have not been able to find how to get back into 25 line mode.
Just type at the prompt Ctrl-[ (or press Esc), '[', '0', '~'. The
cursor will hop to the left marging and be big again. Don't forget to
erase these characters from your buffer. (Just press Return and ignore the
error)

> b) Some programs screw up because they think they are still working with a 25
>    line screen. So far I have observed 'mined'. This is what happens:
>    mined comes in on the top half of the screen because it intends to work with
>    25 lines only. Scrolling back and forth in a file larger than 25 lines
>    results in downwards-scrolling text spilling over into the lower screen area.
>    Repeated scrolling up and down seems to cause confusion because not only is
>    there spillover but also the top 25 lines (where mined has its active window)
>    show multiple repeated lines. The file being edited is not corrupted, it is
>    only the screen output.
You can make a termcap entry for this, or take the vga50 entry Fred posted
just a short while ago. I tried it, and it works like a cinch for elvis.
Mg also accepts it, as well as elle. Mined however has the 25-lines
hacked in, and is therefore not willing to change it's mind.

Greetings, Bert

=====================================================================
    Bert Laverman		email: bert@arrakis.nl.mugnet.org
    Molukkenstraat 148		work:  laverman@cs.rug.nl
    9715 NZ  Groningen
    The Netherlands		tel.:  +31 50 - 733587

   From "How to catch a lion in the desert":
      The Peano method:
	In the usual way construct a curve containing every point
	in the desert. It has been proven that such a curve can
	be traversed in arbitrarily short time. Now we traverse
	the curve, carrying a spear, in a time less than what it
	takes the lion to move a distance equal to it's own length.
=====================================================================