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From: Charles Sandmann <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: cwsdpmi "protected mode not availible" on win2k, stub don't work
Date: Sun, 01 Apr 2007 15:19:09 CDT
Organization: Rice University, Houston, TX
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> I get "Protected mode not avcailible" when I run my app under Windows 
> 2000 consistently, whether I include the stub or whether I have the 
> cwsdpmi.exe alongside it.

Something is wrong with your Windows 2000.  It should provide DPMI services.
There should be a \WINNT\SYSTEM32\AUTOEXEC.NT file which contains
a line "lh %SystemRoot%\system32\dosx" to install DPMI support.

Since Windows 2000 is a protected operating system it will not allow
other programs such as CWSDPMI to run to provide DPMI.