Date: Tue, 22 Oct 2002 21:51:27 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: Marcus Koch <mw DOT koch AT cityweb DOT de>
Message-Id: <2561-Tue22Oct2002215127+0200-eliz@is.elta.co.il>
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CC: djgpp AT delorie DOT com
In-reply-to: <3DB57E77.57D69156@cityweb.de> (message from Marcus Koch on Tue,
	22 Oct 2002 18:36:07 +0200)
Subject: Re: memmory-problems with djgpp and cwsdpmi
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> Date: Tue, 22 Oct 2002 18:36:07 +0200
> From: Marcus Koch <mw DOT koch AT cityweb DOT de>
> Newsgroups: comp.os.msdos.djgpp
> 
>    #include<iostream.h>
>    #include<dpmi.h>
> 
>    int main()
>    {
>       unsigned long           size;
>       char                    *pointer;
> 
>       size = _go32_dpmi_remaining_physical_memory();
>       cout << "\n" << (unsigned long) size;
> 
>       pointer = (char *) malloc(1000000);
>       if(pointer == NULL) cout << "ERROR";
> 
>       size = _go32_dpmi_remaining_physical_memory();
>       cout << "\n" << (unsigned long) size;
>    }
> 
> i get the following output:
> 
>    i:\prg\mwkdb\t2
> 
>    63602688
>    63594496
> 
> 1.) As you see it only consumes 8192 bytes of memmory but i requested
> 1000000.
>  WHY WHY WHY ????

See section 15.2 of the DJGPP FAQ list, it explains this behavior.