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From:	"Charles Sandmann" <cwsdpmi AT earthlink DOT net>
Newsgroups:	comp.os.msdos.djgpp
References:	<d9cc89d0-2aba-440e-9aad-50d9c1f57709 AT p5g2000pri DOT googlegroups DOT com>
Subject:	Re: djgpp compiler and tools, execution of apps on 64-bit windows
Date:	Wed, 12 May 2010 00:05:05 -0500
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"Jim Michaels" <jmichae3 AT yahoo DOT com> wrote in message 
news:d9cc89d0-2aba-440e-9aad-50d9c1f57709 AT p5g2000pri DOT googlegroups DOT com...
> on, say, 64-bit windows 7, can you execute 32-bit CWSDPMI DOS apps
> compiled with DJGPP in a CMD.exe shell?
> can you execute the DJGPP toolset in a CMD.exe shell?

No to both.  DJGPP images appear as DOS 16-bit images to
Windows (the stub is 16-bit DOS).  16-bit programs cannot
run under a 64-bit mode unless they are done in emulation.
Emulation products will run DJGPP images, but more
slowly.

> what about 32-bit windows 7?

Should be fine, but 32-bit Win7 is also hard to find.

> I was going to utilize this information to base my purchase decision
> on a new computer.

If the computer has 3GB of memory or less, the 32-bit version
makes more sense for lots of reasons.  If the computer has more
than 3GB of memory, you will probably only get to use 3GB
or maybe 3.5GB of it under 32-bit Windows.  There are tools
that allow you to use the unused memory for other things like
a RAM disk.

> should I just stay with venerable old XP 32-bit?

It is more compatible with DJGPP images and lots of
software out there, but is hard to find.  Microcenter
currently has a reasonable new dual core XP-Pro Dell
system for $399 if you want to stick with previous
generation software.  It comes with upgrade rights to
Win 7 Pro if you decide to upgrade. 

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