Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/17/84; site mhuxi.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxn!mhuxm!mhuxf!mhuxi!v1b
From: v1b@mhuxi.UUCP (davis)
Newsgroups: net.micro.pc
Subject: Re: Anyone know how to enlarge the PC-DOS default environment size?
Message-ID: <410@mhuxi.UUCP>
Date: Tue, 11-Mar-86 08:11:57 EST
Article-I.D.: mhuxi.410
Posted: Tue Mar 11 08:11:57 1986
Date-Received: Fri, 14-Mar-86 04:05:50 EST
References: <1007@unmvax.UUCP> <40@ur-tut.UUCP>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 65

> ---------------Keyboard Sacrifice to the Line Eating Unix God!-----------------
> 
> Anyone...
> 
>     Several months ago someone posted a way to enlarge DOS 3.0's or DOS 3.1
> default environment area.  I need to store several environment variables there
> using the "SET name = value" command from PC-DOS. This is necessary for both
> my text editor and 2 of the compilers that I use.
> 
>     I'd appreciate it greatly if the patch could be either posted to  
> net.micro.pc or emailed to me.
> 
>     My thanks in advance...
> 
>                                      --->> Shekondar <<---
> 
>From shqer Fri Dec 20 08:36 EST 1985 forwarded by shqer
>From 2212msr Fri Dec 20 08:37 EST 1985 remote from whuts
This has been posted before but it seems to be of continuing interest
to net subscribers.  NOTE - I'M STILL LOOKING FOR ADDRESS TO PATCH
FOR USE WITH DOS 3.1 (ON IBM-AT).

This patch increases the environment size from 128 bytes to (H)0080 (128
decimal) paragraphs of 16 bytes each.

debug a:\command.com
-u cs:0f2b                ;DOS VERSION       LOCATION
                          ;2.X                CS:ECE
                          ;2.0 (COMPAQ)       CS:F66
                          ;2.11(ATT&T PC6300) CS:DF2
                          ;3.0                CS:0F2B
                          ;contents should be MOV BX,000A
-a0f2b                    ;address to asemble new code into
XXXX:0f2b mov bx,0080     ;system prompts you with XXX:0f2b
-                         ;enter carriage return
-w                        ;write change
YYYY                      ; message telling how many bytes were written
-q                        ;quit

For DOS 3.1, an undocumented feature of the SHELL command is used
in the CONFIG.SYS file:

shell=drive/pathname_of_command_processor drive/path_to_command_process
      /p/e:number_of_16_byte_paragraphs

      where:  10<paragraphs<63

Example, giving 480 byte environment space:

shell=c:\command.com c:\/p/e:30

I'd like the address to patch in DOS 3.1, since the SHELL feature is undoc-
umented, and hence unsupported.

Max S. Robin
AT&T Bell Laboratories
Rm. 3E-318A
Whippany, NJ 07981
201-386-6865

email:whuxg!2212msr



           vern bradner (ihnp4!mhuxi!v1b)