Date: Sun, 23 Jul 2000 08:08:05 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Jason Green <news AT jgreen4 DOT fsnet DOT co DOT uk>
cc: djgpp AT delorie DOT com
Subject: Re: to del a window ...
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On Sat, 22 Jul 2000, Jason Green wrote:

> However, there is one mode that would be a useful addition to DJGPP,
> if someone could work out how to implement it.  80x60 chars is listed
> in the Linux LILO docs as one of the standard VGA text modes and is
> achieved using a 640x480 pixel variation of the 80x50 char text mode
> (normally 640x400 pixels).  
> 
> I tried to implement this in DOS using ideas taken from the LILO
> source code, but numerous reboots suggested this is not the project
> for me. ;-)  If anyone is interested in looking at this I can dig out
> the references and/or source code.

Try looking at the source of the DJGPP library function _set_screen_lines
(it's in the file src/libc/pc_hw/co80conio.c that comes with djlsr203.zip)
and its subroutines.  It might give you some ideas to try.