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From: dmg@ssc-vax (David M Geary)
Newsgroups: comp.lang.fortran,comp.lang.c,comp.lang.c++
Subject: Re: Running long memory intensive programs!
Message-ID: <4117@ssc-bee.ssc-vax.UUCP>
Date: 14 Jun 91 18:16:22 GMT
References: <1991Jun12.203754.9356@noose.ecn.purdue.edu> <1991Jun13.160602.23726@afit.af.mil>
Sender: news@ssc-vax.UUCP
Reply-To: dmg@ssc-vax.UUCP (David M Geary)
Organization: Boeing Aerospace & Electronics
Lines: 43

In article <1991Jun13.160602.23726@afit.af.mil> dlindsle@afit.af.mil (David T. Lindsley) writes:
>From a design standpoint, you'd be better off with C++, I think.
>
>However, it does so by using the Phar Lap (memory management?)
>software.  We have had this here at AFIT for about six months; as far
>as I know, we haven't even been able to get Watcom's demo programs
>(supplied with the compiler) to work.  (The people trying to get it
>to work are electrical & computer engineers, FYI.)
>
>You need a compiler that will compile 386 code.  As far as I know,
>what these things basically do is raise an exception or some signal
>which puts the CPU into (386) protected mode.  Now you've got your
>4GB segments, and the program can run.  When it's done, the CPU goes
>back into whatever mode it was in.
>

  I have been involved for about 2 years writing a GUI which
  consumes quite a bit of memory at run time.  I developed it under
  Unix, and all was rosy until I went to port to the PC ;-(

  After many headaches trying to deal with the brain-dead DOS
  architecture, we finally purchased PharLap's DOS Extender.  It has
  worked like a charm.  We have not fully ported to PC yet, but most
  of the technical problems we had have been solved by using
  PharLap's product.  I highly recommend it.

>Anyway, like I said, you need a compiler that "speaks 386".  I like
>Borland's compilers, but I'm not sure if they've got a 386 line.  I
>know Zortech does, though.  Have you considered getting Unix for your
>386?
>
  Well, we used MS C 5.0 along with PharLap's DOS Extender and
  things have turned out well.  We support many customers internal
  to Boeing, and it was not a feasible thing to have to tell our
  customers that they had to install Unix on their PCs to run our
  product.

  Check out PharLap's DOS Extender.  It works.
-- 
|~~~~~~~~~~       David Geary, Boeing Aerospace, Seattle, WA.       ~~~~~~~~~~|
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