From:	"Peter Remmers" <pitti AT tfh-berlin DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: VGA memory scheme
Date:	Wed, 16 Dec 1998 14:34:39 +0100
Organization:	TFH-Berlin (Berlin, Germany)
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Alex Lowe schrieb in Nachricht <3677044C DOT 41456251 AT immediate DOT net>...
>I know that this is not the most common video mode but does anyone know
>how to write directly to memory in 640x480x16, mode 0x12?


Doing graphics in this mode ist not so easy as you have to fiddle
alot with the VGA registers. This is a planar mode, you have to select which
plane(s) you want to write to. There are 3 read/write modes each of which
has its own special use etc...
I suggest you leave this stuff to a gfx library like GRX or Allegro, or,
if you really want to get into it, get a good book about it.
I can recommend "Programmer's Guide to the EGA and VGA Cards"
from Richard F. Ferraro / Addison-Wesley.

Peter Remmers

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