Running MS-DOS 6.2 Step-Up Setup /E with Stacker 3.11 (108361)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.2
This article was previously published under Q108361
If Backup, Undelete, and/or Anti-Virus were not on your system when you
installed MS-DOS 6.2 Step-Up, but you now want the MS-DOS 6.2 versions of
these programs and you are using Stacker version 3.11, the procedure in the
MS-DOS 6.2 Step-Up README.NOW file for installing them does not work
correctly. To work around this situation, follow the steps below.
To work around this problem:
• Use the MS-DOS Expand utility (EXPAND.EXE) to expand the required files
(using the table below for reference) from the original MS-DOS 6
NOTE: If you expanded the Backup or Anti-Virus files in step 1, skip to
step 4. If you expanded the MS-DOS-based or Windows-based version of
Undelete, go to step 2.
• Run 62STAC.EXE, or run Debug as described below in the section titled
"Changing the Stacker Version Number in Memory" to change the Stacker
version number from 3.11 to 3.10 in memory.
• Run MS-DOS 6.2 Step-Up to update the files.
• Manually create the MSTOOLS group and icons in Microsoft Windows if you
expanded the Windows-based versions of Backup, Anti-Virus, and/or
Files Required for the MS-DOS-Based Utilities
Files Required for the Windows-Based Utilities
Changing the Stacker Version Number in Memory
To change the Stacker version number in memory (so you can run MS-DOS 6.2
Step-Up), contact STAC Electronics to obtain the 62STAC.EXE file, or follow
the procedure below. You can order the 62STAC.EXE file from STAC
Electronics, or you can download it from the STAC Electronics bulletin
board service at (619) 431-7405.
If you do not obtain 62STAC.EXE, you can work around this problem by using
the Debug program to make the Stacker driver report version 3.1 instead of
3.11. The following procedure uses Debug to change the memory location that
Setup looks at to determine the Stacker version.
• If you have not already done so, exit SETUP by pressing F3. If necessary, boot from the Uninstall Disk 1 and follow the instructions on the screen to return to your previous version of MS-DOS.
• At the MS-DOS command prompt, type the following command and press ENTER:
• Check the name column for the STACKER or STACHIGH program.
• Using the program name found in the previous step, type the appropriate command below and then press ENTER:
Make note of the segment address displayed by this command (for example,
0025F). You will need this address in a later step.
• At the MS-DOS command prompt, enter the following command and press ENTER:
This should bring you to the Debug hyphen (-) prompt.
• At the Debug prompt, type the following command and press ENTER
where <ssss> is the last four digits of the segment address displayed
in step 4. For example, if the segment address from step 4 was 0025F,
Debug displays a segment:offset pair, for example, 025F:0A4A.
• Type the following command at the Debug prompt and then press ENTER
where <ssss:oooo> is the segment:offset displayed by step 6. For
Debug displays a block of information similar to the following:
025F:0A40 5A A5 37 01 D0 00
025F:0A50 08 01 14 01 03 02 76 10-00 00 03 00 A4 09 20 6D
025F:0A60 00 00 00 00 00 00 00 00-00 0A 00 00 00 0A 00 00
025F:0A70 20 63 00 00 00 02 00 40-E0 69 3A 00 CD 13 CD 14
025F:0A80 CD 01 CD 03 1A 00 02 03-00 00 81 07 03 01 14 00
025F:0A90 CA 00 00 80 5E 19 00 00-00 00 00 00 53 57 41 50
025F:0AA0 00 01 02 03 04 05 06 07-08 03 0A 0B 0C 0D 0E 0F
025F:0AB0 10 11 12 13 14 15 16 17-18 19 00 00 B0 03 F9 01
025F:0AC0 00 00 00 00 00 00 24 01-01 01
Looking across the top row of this block, you should see the "5A A5 37
01" pattern. If you see this pattern, proceed to step 8.
If you do not see this exact pattern and more than one segment:offset
pair was displayed by step 6, repeat step 7 for each segment:offset pair
until you locate the memory block that contains this pattern.
If you do not see this exact pattern and you have checked all
segment:offset pairs displayed by step 6, exit Debug by pressing Q and
ENTER. Contact STAC Electronics to obtain the 62STAC.EXE file.
• After locating the pattern as described in step 7, type the following command at the Debug prompt and press ENTER
where <ssss:oooo> is the segment:offset pair used in step 7. For
In this example, Debug displays the following (the segment:offset
• Press the SPACEBAR two times. Debug displays the following:
IMPORTANT: If you do not see the "5A. A5. 37." pattern, press ENTER
to return to the Debug hyphen prompt. Then press Q and ENTER to
quit Debug. Contact Microsoft MS-DOS Technical Support for further
• Type 36 and press ENTER. This returns you to the Debug hyphen prompt.
• Press Q and ENTER to quit Debug.
DO NOT restart your computer. If you do, you must go through this procedure again.
• Run the MS-DOS 6.2 Setup program.
At the time MS-DOS 6.2 was released, the current version of Stacker was
3.1. Microsoft ensured MS-DOS 6.2 Upgrade and MS-DOS 6.2 Step-Up can detect
and install correctly over Stacker versions 3.1 and earlier.
Since Microsoft cannot guarantee how MS-DOS will interact with future
versions of Stacker, MS-DOS 6.2 Setup was not designed to detect and
install over versions of Stacker later than 3.1.
STAC Electronics has released Stacker version 3.11; however, the box and
disks still indicate version 3.1. You can tell the difference between
Stacker 3.1 and 3.11 by the file dates and sizes. The file date for Stacker
version 3.11 is 9/08/93, and the files are marked with the time 3:11 A.M.
The problems described above occur with Stacker 3.11.
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