Mystery: How does norton get 25/40 lines on EGA/VGA?

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#5961

From: Joseph Gil
Date: Fri, 26 Apr 1991 06:34

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Here is a puzzle I couldn't solve. Norton Control Center (ncc)
and Norton Change Dir (ncd) allow one to use 35 lines on EGA
and 40 lines on VGA. This can be easily done by downloading
a font of 16x10 to the screen adaptor (function 11h in INT 10).
But where is this font? It is not in the programs code (at least I couldn't
find it there)!

So the questions are:
	a) Is there a 16x10 font in the ega/vga adaptor memory? Any1 has
	a detailed manual?
	b) How can this font be accessed?
	c) Given an adapter with a font loaded in it- is there
	a way of extracting the font from the adaptor memory?

In case it wasn't clear- All this concerns text modes only.

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Message-ID: <1991Apr26.063431.26967@cs.ubc.ca>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!dali.cs.montana.edu!uakari.primate.wisc.edu!sdd.hp.com!spool.mu.edu!uunet!van-bc!ubc-cs!yogi
From: yogi@cs.ubc.ca (Joseph Gil)
Newsgroups: comp.os.msdos.programmer
Subject: Mystery: How does norton get 25/40 lines on EGA/VGA?
Summary: Strange VGA/EGA font modes.
Keywords: Norton fonts
Message-ID: <1991Apr26.063431.26967@cs.ubc.ca>
Date: 26 Apr 91 06:34:31 GMT
Sender: usenet@cs.ubc.ca (Usenet News)
Distribution: comp.os.msdos.programmer
Organization: University of British Columbia, Vancouver, B.C., Canada
Lines: 15