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       STACKER NOTE                                         STACKER NOTE
                             STACKER AND QEMM 7.0
           (Applies to Stacker 3.1 for Windows and DOS and MS-DOS 6)
       STAC FAX 31101  (08/93)
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       BACKGROUND
       
       If you use QEMM 7.0 to load STACKER high while SMARTDRV.EXE 4.0
       (from Windows 3.1) is running, the system will not be able to
       access the Stacker drive. You may see a message like:
       
            Invalid unit reading drive {drive}
       
       where {drive} indicates the Stacker drive.
       
       According to Quarterdeck Office Systems (QEMM 7.0), this problem
       arises only when SMARTDRV.EXE from WINDOWS 3.1 is in memory.
       SMARTDRV is unable to locate STACKER's "footprint" in memory, so
       it ignores STACKER's drives.  Use the procedure below to force
       the "footprint" to be left behind for SMARTDRV to locate.
       
       PROCEDURE
       
       To let SMARTDRV recognize your Stacker drives, add the QEMM
       undocumented "/STUB" switch to the STACHIGH.SYS line in the
       CONFIG.SYS file. Use the following procedure:
       
        1. Edit your CONFIG.SYS file to modify to QEMM device driver
           line. Type:
       
               ED C:\CONFIG.SYS <Enter>
       
        2. Locate a line that looks something like this:
       
               DEVICE=C:\QEMM\LOADHI.SYS /R:1 C:\STACKER\STACHIGH.SYS
       
        3. Use the arrow keys to position the cursor, then modify the
           line to look like this:
       
           DEVICE=C:\QEMM\LOADHI.SYS /STUB /R:1 C:\STACKER\STACHIGH.SYS
       
        4. Save the CONFIG.SYS file and exit to DOS.
       
        5. Restart your computer.
       
                                   Note
                 QEMM has a maintenance release (7.01) that
                 solves this problem. Contact Quarterdeck for
                 details.


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       Copyright 1993, Stac Electronics                      Page 1 of 1