Xref:	news2.mv.net comp.os.msdos.djgpp:7096
From:	Luke Steele <luke AT jags DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	__dpmi_physical_address_mapping problems.
Date:	Sun, 11 Aug 1996 10:36:28 GMT
Organization:	INTERact BBS UK (01753) 775533
Lines:	30
Message-ID:	<Dvz18E.6wH@ftp.jags.co.uk>
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

	Hi,
	I'm having difficulty with the __dpmi_physical_address_mapping
function.  I'm trying to use it to convert the physical address of the
linear frame buffer returned by the VESA driver, but whenever I use
the function I get an invalid opcode error.  I've simplefied the code
to this:

	#include "dpmi.h"

	void main(void)
	{
		__dpmi_meminfo meminf;

		meminf.size = 640*480;
		meminf.address = 256*1024*1024;
		__dpmi_physical_address_mapping(&meminf);
	}

	But this still generates the same error.  I've also tried writing a
similar function myself, but this too generates the same error.  Has
anyone any idea how I can solve this problem?  If there's an
alternative way of accessing the VESA linear frame buffer, that would
also be great.
	Thanks!

--
Luke Steele
(luke AT jags DOT co DOT uk)

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