NetNews Usenet Archive 1992 #26/NN_1992_26.iso/spool/comp/os/msdos/programm/10603

Internet Message Format | 1992-11-14 | 1.7 KB

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From: [e-mail] (Jochen Roderburg)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Environment size hack in DOS 5?
Date: 13 Nov 92 17:27:50
Organization: Regional Computing Center, University of Cologne, F. R. Germany
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: berry.rrz.uni-koeln.de
In-reply-to: [e-mail]'s message of Thu, 12 Nov 1992 23:45:02 GMT

In article <[e-mail]> [e-mail] (George Jetson) writes:

   In versions of DOS prior to 4.0, there was a well known patch location
   in COMMAND.COM that allowed you to change the default environment size.
   The default was usually something like 160 bytes (0A paragraphs), which
   is ridculously low.  However, it was a simple matter to use DEBUG to
   patch it to something reasonable (e.g., setting the byte to 30 would get
   you a 768 char [minimum] environment, in all your subshells.)

I can't tell you the exact location, only for the german version which
wouldn't help you very much, but I remember that the unexpected problem
with this patch for DOS 5 was, that the default environemnt size is now
256 and not 160, so you have to search for something with hex 10 and
not hex 0A to locate the patch point.

Jochen Roderburg
Regional Computing Center
University of Cologne
Robert-Koch-Str. 10                    Tel.:   [phone]
D-5000 Koeln 41                        E-Mail: Ro @ RRZ.Uni-Koeln.DE
Germany