Date: Sat, 13 Oct 2001 14:50:07 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: Felix Natter <f DOT natter AT ndh DOT net>
Message-Id: <8484-Sat13Oct2001145006+0200-eliz@is.elta.co.il>
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CC: djgpp AT delorie DOT com
In-reply-to: <87d73r96yo.fsf@mybaby.home.felix> (message from Felix Natter on
	13 Oct 2001 12:20:47 +0200)
Subject: Re: Windows 2000: __dpmi_physical_address_mapping fails
References:  <87d73r96yo DOT fsf AT mybaby DOT home DOT felix>
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> From: Felix Natter <f DOT natter AT ndh DOT net>
> Newsgroups: comp.os.msdos.djgpp
> Date: 13 Oct 2001 12:20:47 +0200
> 
> with code like this:
> 
>   __dpmi_meminfo meminf;
>   meminf.address = vbe_modeinfo.PhysicalBasePtr;
>   meminf.size	= screensize;
>   if (__dpmi_physical_address_mapping(&meminf) ==	- 1)
>     => error
> 
> "__dpmi_physical_address_mapping" fails on Windows 2000 (both in the DOS
> box or when I select Dos on startup).
> 
> I am using cwsdpmi (the version that comes with djdev2.02).

Please post a minimal complete program which can be compiled and which
exhibits this behavior.  (The main detail you left out are the values
of the base address and the size you pass to __dpmi_physical_address_mapping.)

Also, how exactly does it fail? do you get -1 from the function?  If
not, please tell the details about the failure.

> does a more recent version of cwsdpmi fix this or is there another
> workaround ?

The latest CWSDPMI does indeed fix a subtle problem with this DPMI
function, but CWSDPMI has nothing to do with running your program on
Windows, only on DOS.  So it's not at all clear that this is a CWSDPMI
issue.