🚀 go-pugleaf

In an idle moment I put together the following batch file to convert
the 04-09-91 version of CHKDSK.EXE from MS-DOS 5.00 to the 11-11-91
model (only a three byte change after all). No guarentees but it seems
to work ok on my PCs. Please follow the instructions exacticalylylyly.

					Merry Christmas, Y'all,

						Padgett

- ---------------------cut here ---8<-------------------------------------
@echo off
echo CHKFIX.BAT by Padgett. Patch for early MS-DOS 5.00 CHKDSK.EXE that has
echo   been reported to corrupt disks having over 62,000 allocation units
echo   when the /F switch is used.
echo.
echo This program is FreeWare but no guarentee of any kind is made. Use
echo   is entirely at your own risk. Please read all messages carefully.
echo.
echo If at all possible, obtain the "official" MS-DOS release. This program 
echo   has not been authorized by MicroSoft in any way.
echo.
echo The original CHKDSK.EXE must be in the current directory. On conclusion 
echo   a new program CHKDSK2.EXE will be created with the same changes as 
echo   found in the MS-DOS 5.00 CHKDSK.EXE dated 11-11-91.
echo.
echo This program also expects that DEBUG will run from the current directory.

if not exist chkdsk.exe goto endit
if exist chkdsk2.exe del chkdsk2.exe

dir chkdsk.exe 
echo.
echo IMPORTANT: use *only* with the 16,200 byte version of CHKDSK.EXE
echo   shipped with the original DOS 5.00 dated 04-09-91 or its exact
echo   duplicate. Ctrl-C will exit.
echo.
pause

echo Creating CHKFIX.DAT (will be deleted when done).

echo s1l1 ">>> 4F <<< original value in 283F">chkfix.dat
echo e283f>>chkfix.dat
echo 7f>>chkfix.dat
echo s1l1 ">>> 8B <<< original value in 2841">>chkfix.dat
echo e2841>>chkfix.dat
echo 32>>chkfix.dat
echo s1l1 ">>> F9 <<< original value in 2842">>chkfix.dat
echo e2842>>chkfix.dat
echo ed>>chkfix.dat
echo w>>chkfix.dat
echo q>>chkfix.dat

copy chkdsk.exe c2.e >nul
echo Creating new CHKDSK2.EXE
debug c2.e <chkfix.dat
echo If the value in brackets ">>>  <<<" is not the same as the current value
echo   two lines below it, do not use the resultant CHKDSK2.EXE. If the
echo   change value (following line) is the same as the current value, you
echo   already have the updated version
ren c2.e chkdsk2.exe
echo.
echo CHKDSK2.EXE created, cleaning up directory
del chkfix.dat >nul
:endit
- --------------------------end CHKFIX.BAT-------------------------------------