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From: RayeR <glaux AT centrum DOT cz>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: incompatible
Date: Mon, 21 May 2012 13:56:58 -0700 (PDT)
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Yes, RSX/NT but I never tried it. I also think that watcom can do it
or is it my misremember?
It seems to me impractical to use extra DLL and extender. Also it  is
probably a hack to some older djgpp source. We would need something
that could be easily patched to recent gcc, binutils, djdev... without
much extra effort to allow update it again when newer versions will be
released. But it may be hard due to DJGPP dependency on DPMI and DOS
calls so in this case it may be better to make some NTVDM-like
extension for win64 cmd (e.g. with using those mentionex VTX - I don't
know details how it works and if it's helpfull for 16bit code). It
would be much comfortable to run DJGPP programs directly via cmd
instead of loading some VM with DOS inside separated from host
filesystem and taking long time to load. I think if Japheth could
write win32 support for DOS it shouldn't be harder to make DOS/DPMI
support for win64 if VTX can help instead of missing V86...