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Article View: comp.os.msdos.programmer
Article #3629

Environment size hack in DOS 5?

#3629
From: George Jetson
Date: Thu, 12 Nov 1992 23:45
35 lines
2394 bytes
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.)

The ability to do this is absolutely curitical to my use of DOS, and it
is one of the main reasons I stick with a version of DOS 3.x.  However,
I a friend of mine insists on using DOS 5, and she is having environment
size problems (I.e., programs which are run under Windoze or other menu
programs get small environments)

I have spent fruitless hours perusing the DOS 5 COMMAND.COM, and have
not been able to solve this problem.  (I did it originally on a version
of DOS 3.3, long ago, in a couple of hours, so I know it should not be
that hard).  I have also spent time on DR DOS 6.0, with the same dismal
results.  I have also perused the usual gang of archive sites, and have
not found anything.  So, my question to the net is, "Does anyone know
the magic patch locations for DOS 5.0?"

BTW, patching COMMAND.COM *is* the only correct solution.  CONFIG.SYS
only affects the first loaded copy of COMMAND.COM.  Further, there are
various kludge solutions floating around, e.g., ENV.ARC (from 1988 [!]) in
MSDOS.SYSUTL on Simtel, et al, but I am not interested in kludge solutions.

Anyone know the magic formula?

************************************************************************
I've been told to back off on the diode jokes, but I still don't
like smileys ;-)

	- pynq@quads.uchicago.edu, who is still costing the net
	  hundreds, if not thousands, of dollars, every time he posts -
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Path: arc1-ca.pugleaf.net!sparky!uunet!destroyer!ncar!uchinews!quads!pynq
From: pynq@quads.uchicago.edu (George Jetson)
Subject: Environment size hack in DOS 5?
Message-ID: <1992Nov12.234502.22273@midway.uchicago.edu>
Summary: Don't tell me about SHELL= in CONFIG.SYS!
Sender: news@uchinews.uchicago.edu (News System)
Reply-To: pynq@midway.uchicago.edu
Organization: D. J. Dougherty & Associates
Date: Thu, 12 Nov 1992 23:45:02 GMT
Lines: 35