Xref: news2.mv.net comp.os.msdos.djgpp:3520
From: brennan AT mack DOT rt66 DOT com (Brennan "Mr. Wacko" Underwood)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Copying normal mem to graphics mem (VBE 2.0 & linear)
Date: 6 May 1996 17:28:42 -0600
Organization: None, eh?
Lines: 26
Message-ID: <4mm1va$cq7@mack.rt66.com>
References: <4mborc$bq0 AT news DOT mel DOT aone DOT net DOT au>
NNTP-Posting-Host: mack.rt66.com
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <4mborc$bq0 AT news DOT mel DOT aone DOT net DOT au>,
Leath Muller <leathm AT gbrmpa DOT gov DOT au> wrote:
>I have setup a area of graphics memory using UniVBE and the VBE 2.0 calls
>which I have mapped to a segment using __djgpp_allocate_LDT_descriptors.
>The problem is, whenever I try to copy memory to this new selector using
>the segment returned from the call, I get either a protection fault (if it
>compiles), or an error at compile time in my code. The error at compile
>time has something like
>	unexpected letter after %-...
>
>Can anybody help me with this??? 
>
>All I need (even code!!! :) is to know how to do, say a rep movsl, from
>my malloc'd memory, to the graphics memory.

DJGPP will automagically turn a memcpy with constant-length into an inline
rep movsl. If you will have variable numbers of words to blit go
check out http://www.rt66.com/~brennan/djgpp/bgtia.html towards the end.

Also, get vbe.zip to make sure you're mapping the memory region in right.
I use the nearptr method.


--brennan
-- 
brennan AT rt66 DOT com  |  fsck /u