  
PSS ID Number: Q104252
Article last modified on 11-21-1994
PSS database name: MSDOS
 
6.20 6.22
 
MS-DOS
 
Upgrading MS-DOS 6.2, 6.22 over OEM Base Versions of MS-DOS 6.0 

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The information in this article applies to:
 
 - Microsoft MS-DOS operating system versions 6.2, 6.22
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This information applies to both Microsoft DoubleSpace and Microsoft
DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands
and filenames.
 
SYMPTOMS
========
 
When you try to install MS-DOS 6.2 Step-Up over an original equipment
manufacturer (OEM) version of MS-DOS 6.0, you may receive one of the
following error messages:
 
 - In order to run the MS-DOS 6.2 single-disk upgrade, you must already
   have MS-DOS 6.0 installed on your system.
 
   -or-
 
 - Cannot Update File. Setup could not update the following file to
   MS-DOS 6.2:
 
      <filename>
 
   Although Setup can continue without updating this file, your MS-DOS
   6.2 installation will be incomplete.
 
CAUSE
=====
 
If you receive the first error message noted above, you either have
the OEM "base version" of MS-DOS 6.0, or your OEM has modified the
core MS-DOS 6.2 system files (IO.SYS, MSDOS.SYS, and COMMAND.COM). If
your OEM version of MS-DOS 6.2 falls into either of these categories,
you must either obtain your OEM's version of MS-DOS 6.2 or obtain the
MS-DOS 6.2 Upgrade. If you choose to obtain the MS-DOS 6.2 Upgrade,
you may lose some MS-DOS functionality or features added to MS-DOS 6.0
by your OEM.
 
NOTE: Step-Up cannot upgrade the OEM base version of MS-DOS 6.0
because the OEM base version does not include DoubleSpace, Microsoft
Backup, Microsoft Anti-Virus, and Microsoft Undelete.
 
If you receive the second error message noted above, your OEM has
modified one or more of the MS-DOS 6.2 files but has not modified the
core system files. In this case, you can successfully install MS-DOS
6.2, but some files will not be updated. You may be able to work
around this situation by copying the MS-DOS 6.0 OEM version of the
files that were not updated from the C:\OLD_DOS.1 directory to the
C:\DOS directory and then using SETVER.EXE to report MS-DOS as version
6.0 to the program files that were not updated. Before doing so,
contact your OEM to determine if this would be a safe and practical
workaround.
 
The following OEMs have modified MS-DOS 6.0 in some manner:
 
 - Compaq
 - Dell
 - Texas Instruments
 - Toshiba
 
MORE INFORMATION
================
 
Dell
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MS-DOS 6.2 Step-Up installs successfully, but you lose OEM-added
functionality with the following programs:
 
   KEYB.COM
   POWER.EXE
 
Texas Instruments (TI)
----------------------
 
TI modified core MS-DOS system files. You must either obtain the OEM
version of MS-DOS 6.2 or the MS-DOS 6.2 Upgrade. With the MS-DOS 6.2
Upgrade, you may lose functionality added by TI. Texas Instruments
modified the following MS-DOS 6.0 files:
 
   COMMAND.COM
   DOSSETUP.INI
   FORMAT.COM
   IO.SYS
   PRINT.EXE
   SETUP.OEM
   SYS.COM
 
Toshiba
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Toshiba has released the Toshiba Special Enhancements Package (TSEP) for
MS-DOS 6.2. This release updates an installation of MS-DOS 6.2, adding
Toshiba's special enhancements for complete compatibility with Toshiba's
proprietary features. To use TSEP, your specific Toshiba model must be
compatible with this release of TSEP and must already have MS-DOS 6.2 or
the MS-DOS 6.2 Step-Up package installed on it.
 
To obtain TSEP, download TSEP62.EXE from the Toshiba bulletin board at
(714) 837-4408. For more information, contact Toshiba Technical Support.
 
Toshiba replaces the following MS-DOS 6.2 files:
 
   IO.SYS
   ANSI.SYS
   DISPLAY.SYS
   KEYBOARD.SYS
   EGA.SYS
   GRAPHICS.COM
   GRAPHICS.PRO
   KEYB.COM
   MODE.COM
   EGA.CPI
   CGA.GRB
   EGA.GRB
   EGAMONO.GRB
   MONO.GRB
   VGA.GRB
   VGAMONO.GRB
   EMM386.EXE
   FDISK.EXE
   SMARTDRV.EXE
   FORMAT.COM
 
KBCategory: kbsetup kbdisplay kbtool kb3rdparty
KBSubcategory: msdos msbackup stepup
Additional reference words: 6.20 "incorrect msdos.sys or io.sys"
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Copyright Microsoft Corporation 1994.


 
