From: Jason Green <news AT jgreen4 DOT fsnet DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Info.
Date: Sun, 24 Jun 2001 23:04:22 +0100
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Eli Zaretskii <eliz AT is DOT elta DOT co DOT il> wrote:

> > >Some DOS systems might have problems with the way Info switches the 
> > >display to 40-line mode.  Try setting INFO_LINES=50 in the environment, 
> > >before running Info, and see if that helps.
> > 
> > Why would that be?
> 
> Because some device drivers such as DISPLAY.SYS relocate the system fonts 
> to high memory, and some versions of EMM386 have bugs when those high 
> addresses are accessed.  When Info runs in 40-line mode, it generates its 
> own font (because the system BIOS doesn't include a font suitable for 
> 40-line display), and for that it needs to access the system font, 
> because the generated font is created by tweaking the system font.

Out of interest, why *does* info insist on changing the video mode?

AFAICT, this behaviour is specific to the DJGPP port of info.