Date: Wed, 27 Sep 1995 19:26:11 +0100
From: Andreas Busse <andy AT soft-n-hard DOT de>
To: djgpp-maillist <djgpp AT sun DOT soe DOT clarkson DOT edu>
Subject: Re: Some "stupid" questions from a new user


 > 
 > I'm planning on installing DJGPP on my PC (with QEMM7.04 and the buggy 
 > DPMI (normally disabled), and a lot of diskspace and memory), because I 
 > prefer PCs DOS to UNIX (no intention on religios wars here!), 

Ever tried Linux ? :-)

 > but since  
 > some af my programs will need to run on heavy UNIX-machines because of  
 > the calculation time, it's essential that the porting problem is almost  
 > non-existing.
 > The programs are relatively simple (mainly ANSI but some CPP), the main 
 > problem is that I'm using a lot of large arrays and perform heavy math  
 > computations on them.
 > A typical skeleton of a program would look like this (simplified!):
 > 
 > [...] 
 > Q1: Will DJGPP "eat" a program like this, or do I need some special includes?

I would say yes. Although it might depend on how much memory your box has.

 > Q2: Will the array(s) be placed/swapped on disk if I'm short on memory 
 >     (that's not a problem, as long as I can use the array!)? 

Yes.

 > Q3: Do I need to worry about implementing DPMI-calls myself, when I'm 
 >     using/allocating these large arrays, or is the memoryallocation  
 >     "invisible" for me?

You don't need to care about, just as under Unix.

Hope this helps,
Andy

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Andreas Busse                      | andy AT soft-n-hard DOT de
Soft N Hard GbR                    | Phone: +49 2636-970105
Im Hufen Boden 16, D-53498 Waldorf | Fax:   +49 2636-970106
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