Message-Id: <199812191630.QAA01983@remus>
From: "Arthur" <arfa AT clara DOT net>
To: <djgpp AT delorie DOT com>
Subject: RE: beginner mode13 question
Date: Sat, 19 Dec 1998 16:29:41 -0000
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Reply-To: djgpp AT delorie DOT com

> I am having trouble getting mode13 programs to work. Plotting pixels using
> bios interupts works OK. But as soon as I try to directly address
> the video
> memory, I start to get horrible GPFs. I have tried A000, A0000
> and A0000000
> as the address for video memory but no luck. I have read about special
> commands for near pointers or something but they need
> <sys/nearptr.h> and I
> do not have this file in my /include/sys folder, only farptr.h. Also is
> there a memory model setting for gcc that I need to know about.

DJGPP is a 32-bit protected mode environment. You only have, and only need,
one memory model.

There are tutorials on the VGA under DJGPP on http://www/delorie.com/djgpp/
in the User Guide section, and on http://www.rt66.com/~brennan/djgpp/

It basically boils down to the fact that you can't use nearpointers.

James Arthur - jaa AT arfa DOT clara DOT net
http://www.jado.org/users/arfa/
ICQ#15054819