Newsgroups:	comp.os.msdos.djgpp
Subject:	DPMI for Dummies
From:	gcheak AT sbinet DOT com (Greg Cheak)
Organization:	<Not Organized>
MIME-Version:	1.0
Message-ID:	<3523cca3.0@newscene>
Date:	2 Apr 1998 11:36:35 +0600
Lines:	19
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I have a program called "Cover" (circa 1993) that builds large tables in 
memory. It uses a simple call to malloc() to allocate space for these tables. 
If the call fails, it returns an error code (NULL). This is usually due to 
lack of memory to complete the operation based on the parameters I have set. I 
have 32mb RAM.

The program, a Unix port, compiles straight away with DJGPP.  What I would 
like to do is use  DPMI (CWSDPMI) functions to allocate as much memory as I 
can, so that I can set larger paramters for this program. Even running in 
Win95 with DPMI set to 65535, the program seems not to see it. Is there sample 
code explaining the usage of DPMI in a program? I suspect I would have to use 
a swap file as well.

Oh, the program builds covers ("wheels") using a process called Simulated 
Annealing. It works good for smaller designs. With extra memory I could work 
on larger ones.

- Greg 

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