Message-ID: <3A313B09.6C2BD5A5@zxblr2f.grbl>
Date: Fri, 08 Dec 2000 20:48:25 +0100
From: Gautier <grounfxyz AT zxblr2f DOT grbl>
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: multitasking
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Eli:

> No.  What Windows provides is a way to run several DOS or DPMI
> programs in separate Virtual Machines.  But Windows doesn't let you
> run several DPMI programs in _the same_ Virtual Machine.  To get a
> useful multiprocessing, you need the latter, because separate VMs
> cannot easily communicate to each other, so you have problems with
> redirecting handles, IPC, and other goodies which are what
> multiprocessing is normally used for.

I fully agree. I have just the impression that Mr 4of10 doesn't need
2 programs running in 1 VM. Starting TEST1.EXE and TEST2.EXE in 2 more
VMs could fit (could Mr 4of10 confirm ?).
That you can easily with DR-DOS (there is an equivalent to Win9x's
Start "DOS" command).

> > What about DR-DOS that you can d'load, that provides multitasking _and_
> > in its la(tes)t version 7.03 a fully 32-bit DPMI server ?...

> DR-DOS is not Free Software.

It is not free-"libre" (free speech) but is free-"gratuit" (free beer)
[ (c) R. Stallman ;-) - read http://libre.act-europe.fr/ ]

For certain things, free-"gratuit" is a good thing (not the best) IMHO...

Back to multitasking, I'm not sure that the intra-VM multitasking API of DR-DOS
isn't compatible with DPMI programs - read
  http://www.thur.de/org/schulen/igs/USEFULL/OPENDOS/multtask/mtfront.htm
(I don't have a certain answer but there are mentions of "DPMI")

______________________________________________________
Gautier  --  http://members.nbci.com/gdemont/gsoft.htm