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>
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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.