From:	"John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DPMI and DOS
Date:	Mon, 09 Feb 1998 19:02:37 -0500
Organization:	Two pounds of chaos and a pinch of salt.
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Message-ID:	<34DF991D.1C0F@cs.com>
References:	<34DF957D DOT 75CE AT hotmail DOT com>
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Walter Cohen wrote:
> 
> I tried to run a DOS executable under WIN95's DOS VDM and I got a 'not
> enough memory' error.
> I then tried to just boot up with DOS and a memory manager (EMM386) but
> when I ran it again it said that DPMI was not loaded (or something to
> that effect).
> 
> What can I do to either load DPMI (in DOS) or get enough memory to run
> it under Win95's DOS VDM (I have 612k now)?
> 
> Are there other DOS-like environments that I can spoof under instead of
> MS/IBM DOS?  Like DOS4GW.

Okay, we are back to the Windows 95 memory management question again. 
This is so often asked that it should probably get its own answer in the
FAQ.  Oh wait, it does!  Chapter 15: Memory issues, has a subchapter 6:
Memory allocation peculiarities under Windows 95.  Try reading that and
you'll understand.  The FAQ is available as v2/faq210b.zip from SimTel
or online at http://www.delorie.com/djgpp/v2faq/.

In short, the Windows 95 DPMI host does not automatically provide
sufficient DPMI memory for many DOS programs.  (Blame Bill Gates, not
DJGPP.)  To get more, open the MS-DOS prompt properties sheet and change
the DPMI memory setting manually to 65535.

To get DPMI under DOS, use the free cwsdpmi DPMI host that is
distributed on SimTel along with DJGPP.  The latest version can be found
under v2misc/csdpmi4b.zip.  Install it in your DJGPP tree and your
programs will run in plain DOS.

P.S.:  Unless you are using an obsolete version of DJGPP, the "No DPMI"
message also tells you what file you need, doesn't it?

hth

-- 
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|      John M. Aldrich       | "Always listen to experts.  They'll  |
|       aka Fighteer I       | tell you what can't be done, and why.|
|   mailto:fighteer AT cs DOT com   | Then do it."                         |
| http://www.cs.com/fighteer/|                - Lazarus Long        |
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