Date: Wed, 09 May 2001 20:03:44 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: "Thomas Schachtner" <thomas DOT schachtner AT gmx DOT de>
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CC: djgpp AT delorie DOT com
In-reply-to: <9dbjel$35j$2@news2.dtag.de> (thomas.schachtner@gmx.de)
Subject: Re: read a specific memory address
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> From: "Thomas Schachtner" <thomas DOT schachtner AT gmx DOT de>
> Newsgroups: comp.os.msdos.djgpp
> Date: Wed, 9 May 2001 16:24:24 +0200
> 
> I checked the return values, but none of them failed...
> After modifying the program (making it smaller) the first DMI function
> fails - but only with Windows 2000....

What is that first function--is that __dpmi_physical_address_mapping?

If that fails, you cannot continue.

What are the values of dmi.start and dmi.length printed by this
snippet from your program:

>   mi.address = dmi.start;
>   mi.size    = dmi.length;
> 
>   printf ("mi.address = %08X\n", dmi.start);
>   printf ("mi.size    = %08X\n", dmi.length);
> 
>   if (__dpmi_physical_address_mapping (&mi) == -1)