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From:	Ben Peddell <killer DOT lightspeed AT bigpond DOT com>
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Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: HELP with DPMI under DOS
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Date:	Mon, 20 Oct 2003 10:39:09 GMT
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Silvano Mantione wrote:
> I'm tryuing to allocate an array of 1023Mb on a PC with 1Gb RAM installed
> but I can't success. I try do modify the parameters of cwsdpmi with
> cwsparam, I also try pmode/dj, but nothing to do. I'm writing an application
> memory critical and I'm planning to buy 2Gb more memory (3Gb total) do
> someone have some idea to how can I allocate this memory in a single array
> under DOS?
> Thank You
> 
> 

Try going a few MB lower. Say 1016MB or 1020MB. Remember that your 
program takes some of the XMS memory, and there's a page-table overhead 
of about 1kB per 1MB of memory, so you'd have another 1.5MB or so used 
there (Remember the video card and any other memory mapped I/O).
Failing that, I think CWSDPMI may have a 256MB or 512MB limit.

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