Running long memory intensive programs!
David M Geary
dmg at ssc-vax
Sat Jun 15 04:16:22 AEST 1991
In article <1991Jun13.160602.23726 at afit.af.mil> dlindsle at 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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