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From: rspangle@jarthur.Claremont.EDU (Randy Spangler)
Newsgroups: comp.windows.ms
Subject: Re: Win3 8086 Virtual Machine, again
Message-ID: <7469@jarthur.Claremont.EDU>
Date: 13 Jun 90 22:17:59 GMT
References: <9983@rouge.usl.edu>
Organization: Harvey Mudd College, Claremont, CA 91711
Lines: 48

In article <9983@rouge.usl.edu> pcb@gator.cacs.usl.edu (Peter C. Bahrs) writes:
>
>Well I solved the problem (I think).  For Edix and Procomm   .exe's I ran
>exehdr.  I think I got this with DOS or MS C compiler.  It listed
>the amout of memory needed, static I think.  I added 5 to this and
>used it in the PIF settings.  FINE.!!  I pulled up 5 edix and 3 procomm
>just to see.
>
>But I think this logic does not hold for files with overlays????  
>Quick C listed only 5k needed which definitely did not work.  
>
>I don't believe Edix and Procomm use overlays.  
>
>Is this the best approach to determine a PIF amount setting?
>

To determine the appropriate amount of memory for a PIF file, I usually
start by pulling up the full program in an exclusive command processor
with a full 640KB memory.  Then I shell out from the program to DOS
(most programs can do this - I'm sure Procomm can) and use MAPMEM, a program
from TSRCOM29.ZIP (available at fine ftp sites like Simtel20) to determine
the amount of free memory in the shell.  You could also use chkdsk to 
determine this number.  The difference between this number and 640K 
is how much memory the program requires.  I usually add 16-32K just to be safe.  

Example: (Telix)

1. Run exclusive command processor

		PIF file set to 640K

2. From exclusive command processor, run Telix

3. From Telix, shell to DOS

		memory free = 384K

640K - 384K = 256K required

256K + 32K 'safety margin' = 288K desired



-- 
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|    Randy Spangler                    |    The less things change, the    |
|    rspangle@jarthur.claremont.edu    |    more they remain the same      |
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