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
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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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