Date:	Thu, 30 Mar 2000 11:38:02 +0500
Message-Id:	<200003300638.LAA00861@midpec.com>
From:	prashant_tr AT yahoo DOT com (Prashant TR)
To:	djgpp AT delorie DOT com
In-reply-to:	<054a4830.80e90c42@usw-ex0105-036.remarq.com> (message from
	batchex on Wed, 29 Mar 2000 11:52:30 -0800)
Subject:	Re: VBE question
References:	<054a4830 DOT 80e90c42 AT usw-ex0105-036 DOT remarq DOT com>
Reply-To:	djgpp AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	djgpp AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

batchex <thedark1NOthSPAM AT phreaker DOT net DOT invalid> proclaimed:

> I'm trying to set some VBE modes with Linear Frame Buffer (LFB).
> I've abled to set the mode and map the LFB (at around 3 GB), but
> then, how do I use the mapped address.
> 
> Here's what I do :
> 
> LFBPtr = the mapped address returned by int 31h func. 800h
>          ((ebx << 16) + (ecx & 0xFFFF))
> for(i=0;i<width;i++)
>   LFBPtr[i] = some value
> 
> This approach crash my program.
> 
> I've read somewhere that I have to allocate a descriptor for use
> with the mapped address. But at what base address? limit?

Why don't you try __djgpp_map_physical_memory? It's much easier than using
DPMI functions, IMHO.

- Raw text -