From:	firewind <firewind AT metroid DOT dyn DOT ml DOT org>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: movmem in DJGPP 2.*
Date:	4 Sep 1997 22:44:51 GMT
Organization:	Netcom
Lines:	18
Message-ID:	<5undl3$acu@sjx-ixn4.ix.netcom.com>
References:	<01bcb958$32a58460$750760c3 AT default>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Olmeca <chromes AT hotmail DOT com> wrote:
> I have a code-fragment, like this:
> vga_addr=(unsigned char * ) 0xA0000000;
> movmem(unsigned char * vga_addr,unsigned char *spr, 64000);
> It works in all C-compilers, except in DJGPP: memory error. (exception
> fault, or something like that...)
> What shall I do?

It does not work on "all C-compilers." Any *nix compiler will bomb on the
above code as well. The reason is that DJGPP-compiled programs run in
"protected mode," where it is illegal to reference "just any" address; you may
only reference address within your address space. How to accomplish what
you are trying to do is discussed in the FAQ, section 10.2.

-- 
[- 				 firewind	                            -]
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[- 	    "You're just jealous because the voices talk to -me-."          -]

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