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From: Charles Sandmann <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Video axs in v2 which should be in the faq.
Date: Thu, 28 Dec 1995 15:34:32 CST
Organization: Rice University, Houston, Texas
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Message-ID: <30e30d68.sandmann@clio.rice.edu>
References: <4brgjt$moq AT supreme DOT pcug DOT org DOT au>
Reply-To: sandmann AT clio DOT rice DOT edu
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

> It's simple. In the top(ish) have char *vidmem; and in the initialisation 
> part you must do this (psuedo-ish code, I forgot the function names ;)

This code has a lot of bugs in it.  In particular, a call to sbrk() by
any of the libc routines will reset the limit on DS and cause this to break.
A call to sbrk() may also move the base of the selector - so base_addr is
not a constant, etc.  See sys/nearptr.h and crt0.h for the correct way to do
this (its supported and documented in the next release).