From: The Hodsdons <meh AT cyberrealm DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: New to djgpp, desperate for help...
Date: Sun, 17 May 1998 15:29:45 -0500
Organization: CyberRealm
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To: djgpp AT delorie DOT com
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Okay, let me stress up front my limited experience with programming.  I
have only
really written a couple of dozen straightforward programs to help my
with my
thesis research.  I wrote these programs on Unix workstations (SGI,
Sparc, DEC)
because that was what was available at my University using their canned
C compilers.

Now that I am no longer affiliated with a University, but I want to
continue learning about C programming and continue working on these
programs I wrote, I need to
port them over to my Win95/DOS PC.

I almost bought a commercial compiler but then I bumped into DJGPP.  I
am very
impressed.  I've got the whole thing downoaded and working (at least it
seems to
be working).  I brought my old programs over from the University and
they compiled just fine...

BUT.  The problem is that they don't run.  They all give segmentation
faults.  So,
I started playing around with simple "Hello World" programs.  I have
concluded
that I don't understand something about memory allocation in Win95/DOS.
I
read through the faq and have a hint that what I need to understand
better how to
configure Windows use of memory, i.e. the DPMI stuff.

Okay, after all that, my simple question is: Why didn't this simple
program work?
(I am running it in a Win95 DOS prompt window.  I set DPMI to 65535 as
it
suggested in the FAQ.)

main() {
  int test[90000];
  printf("This is a test.\n");
  return(0);
  }

According to the faq I should have access to a bunch of memory (I have
32 MB RAM, a lot of disk space, on a 200MHZ AMD-K6 machine).  If I
declare the test
array to be much smaller, like 10,000 elements, there is no problem.

I know that there is a bunch of stuff here that I need to read more
about.  I just need
direction.  All of the nice faq pages, info pages, web pages are good,
but too
advanced for my simple problem.  I need basic help.

Well, thanks for getting through this long explanation.  If you want to
respond, I
would appreciate a cc to my e-mail address in case I miss your reply on
usenet.
I don't read news very often anymore.

Mike Hodsdon
meh AT cyberrealm DOT net