The CompuServe IBMPC SIG Users Group
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                         PATCHES FOR IBM DOS 3.3
                         -----------------------


   ************************************************************************

     Note: In the patches which follow, it is assumed the user is familiar
     with the use of DEBUG.  The notation "xxxx" means "anything is ok".
     The notation <cr> means press Enter.

   ************************************************************************

   DISABLE EDLIN AUTOMATIC .BAK FILE CREATION

     This patch will disable the automatic .BAK file when using EDLIN.  Using DEBUG proceed as follows:

   DEBUG EDLIN.COM
   -E 0CD8<cr>
   xxxx:0CD8   56.41<cr>
   -W<cr>
   -Q<cr>

   **********************************************************

   AUTOMATIC INSTALLATION OF PRINTER FOR DOS PRINT

     This patch obviates the need to type the desired printer port when installing PRINT.COM.  If the printer port is LPT1, then using DEBUG proceed as follows:

   DEBUG PRINT.COM
   -E 1936<cr>
   xxxx:1936   E8.90  CD.90  02.90<cr>
   -E 1948<cr>
   xxxx:1948   CD.90  21.90<cr>
   -W<cr>
   -Q<cr>

   If the printer port is LPT2 then the following address must ALSO be
   modified as follows:

   -E 11F1 4 "LPT2"

   *********************************************************

   ECHO OFF

     I have patched COMMAND.COM to set the default to echo off to
   to obviate the need for the ECHO OFF and CLS statements at the beginning
   of a batch file.

   DEBUG COMMAND.COM
   -E 1D68<cr>
   xxxx:1D68  01.00<cr>
   -W<cr>
   -Q<cr>

     Note 1: The default for AUTOEXEC.BAT files will still be ECHO OFF.
     Note 2: If the last thing done in a .BAT file is to do ECHO ON, then
             you will get two prompts at exit.

   To set ECHO OFF in your AUTOEXEC.BAT file.

   DEBUG COMMAND.COM
   -E 1304<cr>
   xxxx:1304  03.02<cr>
   -W<cr>
   -Q<cr>

   **********************************************************

   PERMIT MORE THEN 10 MISMATCHES IN COMP.COM

     I have patched COMP.COM to permit 50 mismatches as follows:

   DEBUG COMP.COM
   -E 0AF3<cr>
   xxxx:0AF3   0A.32<cr>
   -E 0E09<cr>
   xxxx:0E09   31.35<cr>
   -W<cr>
   -Q<cr>

   **********************************************************

   FORMAT: Add BEEP at completion of formatting

     This patch produces a BEEP when FORMAT.COM is done.  The patch is most
   easily made with a disk editor. Using a disk editor look for the exact
   string:

        Format another (Y/N)?

   It begins at offset 2085h (Note: This NOT a Debug address!)  If you
   are using DISMOD, the address is record 0020 byte 85h

   Enter the following exact string (omit quotes), ^G means Ctrl-G:

       "Do another  (Y/N) ?^G "    (Note that one blank space follows ^G)

   If you wish to use Debug then:

     DEBUG FORMAT.COM
     -D 2185 L20<cr>                            ;Displays "Format another..."
     -E 2185  "Do another  (Y/N) ?",07," "<cr>  ;Quotes must be included
     -D 2185 L20<cr>                            ;Displays your entry.
     -w
     -q

   The 07h (^G) does the BEEP.

Below is what you should see after the first D command above.

DEBUG FORMAT.COM
-D 2185 L20
xxxx:2180                 46 6F 72-6D 61 74 20 61 6E 6F 74        Format anot 
xxxx:2190  68 65 72 20 28 59 2F 4E-29 3F 00 49 6E 73 65 72   her (Y/N)?.Inser
                                         ^^                            ^
                                        NOTE: THE 00H MUST NOT BE DISTURBED!!!

   **********************************************************

   SCREEN SCROLLING

     From Ward Christensen, the ANSI.SYS scrolling patches to disable the
   wait for retrace and the screen blanking have new addresses but they
   work just fine.  Using DEBUG, proceed as follows:

   DEBUG ANSI.SYS
   -E 02E3<cr>
   xxxx:02E3   74.90  FB.90<cr>
   -E 02EA<cr>
   xxxx:02EA   EE.90<cr>
   -W<cr>
   -Q<cr>

   **********************************************************

   DISABLE AUTOMATIC HEADER IN FIND.EXE OUTPUT

    The FIND program puts an automatic header  ---------- filename  in the
   output listing.  To disable this header, patch FIND.EXE as follows:

   REN FIND.EXE FIND.TMP

   DEBUG FIND.TMP
   -E 0425<cr>
   xxxx:0425   03.2C<cr>
   -W<cr>
   -Q<cr>

   REN FIND.TMP FIND.EXE

   **********************************************************


Comments to:  --  Ted Eyrick  [72446,317] CIS, IBMPC SIG --