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From: Rugxulo <rugxulo AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: incompatible
Date: Fri, 18 May 2012 14:51:22 -0700 (PDT)
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Reply-To: djgpp AT delorie DOT com

Hi,

On May 18, 3:40 pm, Eli Zaretskii <e DOT  DOT  DOT  AT gnu DOT org> wrote:
> > From: Georg <dos DOT  DOT  DOT  AT googlemail DOT com>
> > Date: Fri, 18 May 2012 10:12:28 -0700 (PDT)
>
> > Most 32bit Windows programs won't run on Windows 7 in 64bit mode too.
>
> Not true.  I have a lot of MinGW 32-bit programs, and they all run
> just fine on a 64-bit Windows 7 machine, natively without any Virtual
> PC software.

64-bit mode should (in theory) run 99% of 32-bit programs fine, though
that assumes you install the 32-bit Windows subsystem (which is
optional for servers, or so I heard). However, I wouldn't say
everything works. Rumor says that even MSVC 2k5 didn't run atop Vista
when it was first released, and I have no idea if they ever fixed
that. So compatibility issues will always exist, even without AMD64.
Presumably APIs change or drivers break or DLLs have regressions, etc.
Nothing is totally foolproof.

But yes, in my experience, almost all Win32 apps run fine atop Win64
(though that is not exhaustive, my tests are very very limited since
there are thousands of apps out there).