From: "Charles Sandmann" <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: 512 MB array ?
Date: Thu, 27 Sep 2001  9:29:23
Organization: Aspen Technology, Inc.
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> I need realy BIG array (for some mathematic / geometric calculations) is it 
> possible to allocate about 512 MB array in DJGGP ? (I have 128 MB RAM, but 
> over 5 GB HDD) I heard, that in protected mode theoritcly You can access up 
> to 4 TB (!) of memory... is it true ?

The DJGPP/GCC architecture is limited to easily accessing 4Gb.  I have tested
CWSDPMI r5 up to 3Gb (1 Gb physical + 2 Gb virtual) and PMODE up to 1Gb physical.
You will probably need to use CWSPARAM to up the disk allocation (the default
is 128Mb I believe).

Some newer Intel chips support up to 64Gb of physical memory, but one process
cannot easily get to all that memory.