Date: Fri, 9 Aug 1996 14:14:56 +0200 (DFT)
From: "Garrido Freire, Fco. Javier ((R)JA.GAR. SOFT)" <garridof AT cs DOT us DOT es>
Reply-To: "Garrido Freire, Francisco Javier" <Francisco-Javier DOT Garrido AT cs DOT us DOT es>
To: John Sabean <docmani AT eng DOT umd DOT edu>
cc: djgpp AT delorie DOT com
Subject: Was: Re: Multitasking in DOS (fwd)
In-Reply-To: <31D400AD.446B9B3D@eng.umd.edu>
Message-ID: <Pine.A32.3.93.960809132306.11912D-100000@nervion.cs.us.es>
Organization: Infoalum Mail Gateway <Infoalum AT cs DOT us DOT es>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Fri, 28 Jun 1996, John Sabean wrote:

> Matt W. Spencer wrote:
> > 
> > >the RSXWDK and RSXNT packages. I got these, but they don't seem to work
> > >with DJGPP v2 (written for 1.x and the OS/2 EMX-GCC). I've taken a look at
> > >the source, and DJGPP 1.x with the RSXNT libraries *does* support fork().
> > >You'd have to be running under Windog though.
> > 
> > But that isn't running multitasking under DOS; it's Winblows.
> > 
> > So what? you say. Winblows is OK, and other multitasking OSes (OS\2, *NIX,
> > etc.) are better than MS-DOG anyway.
> > 
> > But, I spend 95% of my computing time in DOG. I have so for a long time. I
> > have an extensive collection of software for MS-DOG. I'm used to DOG, and I
> > don't want to have to find a whole bunch of matching software for my new
> > OS.
> > 
> > Yeah, I know these are weak arguments, but trying to make a DOS Multitasking
> > Environment would be fun, wouldn't it? :)
> > 
Not necessarily. If DJGPP can spawns a .EXE (and it can) you
haven't to stop using your favourite/extensive collection of
software for DOS.

Problems can raise from those 'bad-behaviour' programs (according
to Ray Duncan's definition in [Advanced MS-DOS Programming, 2nd ed.
Redmond WA: Microsoft Press, 1988, 6.9]). Mainly, accessing
illegaly to memory which doesn't belong to that program (Video
Ram and Interruption Vectors). But, both Windows and OS/2 have
the same problems with that kind of programs...

-------------------------------------------------------------------
F. Javier Garrido F.   (R)JA.GAR. SOFT    Dpto. de Computacion e IA
MINIX User. (USENET comp.os.minix & SCS)  Facultad de Informatica
Email: Francisco-Javier DOT Garrido AT cs DOT us DOT es  y Estadistica de Sevilla
URL: http://www.cs.us.es/~garridof                       (SPAIN)
"The light that burns twice as bright, burns half as long ...
   ... and you have burned so very, very brightly, Roy."
					  TYRREL from Blade Runner