 
June 18, 1988
 
This is the official SoftLogic DoubleDos 4.x patch to make the
program work splendidly with MS/PCDOS 3.3, such as used on
AT/compatibles and others upgrading to the 3.3 dos version.
 
For those not used to working with DEBUG, or with directly
altering important programs, I have embellished the SoftLogic
text with (hopefully) interesting pointers. Other than that,
the following is EXACTLY taken from the SoftLogic Solutions BBS
board (reached at 1-603-644-5556, 1220 baud, 8-N-1), and works
great.
 
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Msg #  628  Dated 04-27-87 07:07:40
From: SYSOP
  To: ALL
  Re: DOS 3.3
 
The following patch will make DoubleDOS 4.0 work with DOS 3.3.
You should make sure DEBUG.COM is available either via your
system path or in the directory containing DoubleDOS.
 
(Enter the following from your DOS prompt:)
 
   debug doubled2.pgm
         (or)
   debug doubledo.pgm
 
(DEBUG will be activated, and your screen will display the "-"
(no quotes) DEBUG prompt.)
 
(Once in DEBUG, it is absolutely vital to enter the following
patch sequence EXACTLY how it appears below. Be sure to include
the spaces and remember that you are entering the numeral "0",
not the capital letter "O".)
 
(Begin typing at the cursor position directly after the "-"
prompt, and strike the RETURN or ENTER key at the end of each
line you enter:)
 
e 2130 20
e 878c c0 a1
e 8b7d 03 50
e 9487 7f ff b7 6e 20 80 c2
w
q
 
(The above code enters the changes required for DOS 3.3, and
writes the "patch" back to the proper DoubleDos file for you.
After you are done, just run DoubleDos 4.x as usual. Not hard
at all, eh?)
 
This patch disables DOS 3.2 support, so do not apply it to your
original disk, but rather to an install or a backup. jack-sysop
 
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Hope you find the above useful!
Joe Rotello, CompuSystems Management
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