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From: kjb@cs.vu.nl (Kees J Bot)
Subject: Re: 1.7.2: How to get VGA 50-line mode?
Nntp-Posting-Host: hornet.cs.vu.nl
References: <pcm2DpF27D.Kr2@netcom.com>
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Organization: Fac. Wiskunde & Informatica, VU, Amsterdam
Date: Tue, 9 Apr 1996 11:01:30 GMT
Message-ID: <DpLDAJ.4Jr.0.-s@cs.vu.nl>
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pcm2@netcom.com (Neil McAllister) writes:

>The title about says it all; I have MINIX 1.7.2 running on my XT, and
>I'd like to use it with the VGA 50-line mode.  I figure that would
>involve changing the "console" boot variable to some value, but for the
>life of me I can't make it change the video mode at all.  I'm pretty
>sure my kernel was compiled to support nonstandard video modes.  I have
>an Oak VGA card, if that helps.

Ralf Brown's most excellent interrupt list shows a number of text video
modes with the word "Oak" in the comments.  You could try setting
'console' to 4E (80x60), 4F (132x60), or 51 (132x43).

If one of these modes works then you will see lots more letters on your
screen.  Alas Minix will make a mess of it, because 80x25 is hardcoded
into the console driver.  Find the definitions of scr_width, scr_lines,
and scr_size, modify them and make a new kernel.

(These values are hardcoded, because making them variable makes the
console driver a whole lot bigger.  Thanks to all those 640k XT's I have
to save every little byte I can.)
--
long:  http://www.cs.vu.nl/~ast/minix.html         Kees J. Bot  (kjb@cs.vu.nl)
short: http://www.cs.vu.nl/ftp/minix/README.html        Systems Programmer
ftp:   ftp://ftp.cs.vu.nl/pub/minix/		   Vrije Universiteit Amsterdam
