From: Elliott Oti <e DOT oti AT stud DOT warande DOT ruu DOT nl>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Disabling Protected Mode
Date: Mon, 30 Dec 1996 07:24:01 -0800
Organization: Academic Computer Centre Utrecht, (ACCU)
Lines: 20
Message-ID: <32C7DE91.5152@stud.warande.ruu.nl>
References: <5a7r11$o1n$1 AT mhafn DOT production DOT compuserve DOT com>
NNTP-Posting-Host: warande1078.warande.ruu.nl
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

John Savage wrote:
> 
> I heard there was some way to disable protected mode in DJGPP...
> what I really want to do is be able to access video RAM directly.
>  Is this possible?
>

#include <sys/nearptr.h>

void foo()
{
 char *VidPtr;
__djgpp_nearptr_enable();
VidPtr = (char *)(0xa0000 + __djgpp_conventional_base);

// Do whatchalike

__djgpp_nearptr_disable();

}