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      STACKER NOTE                                         STACKER NOTE
             UPGRADING TO A DOS VERSION THAT SUPPORTS PRELOADING
                          (Applies to Stacker 4.0)
      STAC FAX  4306 (09-30-1994)
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      BACKGROUND
      
      The new generation of DOS products support preloading compression
      drivers such as Stacker. These new DOS versions include MS-DOS
      6.0 and 6.2, Novell DOS 7, and PC-DOS 6.1 with file dates 9-30-93
      or later. Preloading allows your Stacker driver to load before
      your CONFIG.SYS file. This provides increased safety. The new
      generation of DOS also supports Stacker's use of DPMS. This
      conserves precious memory resources. Full details on Preloading
      are contained in StacFax 4516.
      
      If you upgrade your DOS version to a new generation DOS, you may
      take advantage of preloading the Stacker device driver. The
      procedure below will tell you how.
      
      SOLUTION
      
         - Setup the new DOS version.
         - Setup Stacker as a preloading driver.
           
      Setup the new DOS version
      
      The new DOS' are fully aware of compression. Therefore you can
      install them by simply running their Setup program. Follow the
      instructions that came with your DOS version. Please note that
      having compression on your disk means that you will not be able
      to make an Uninstall disk.
      
      Setup Stacker as a preloading driver
      
      Once you have the new DOS version on the disk, you must configure
      Stacker to take advantage of its features. The simplest way to do
      this is to run the Stacker Setup from disk # 1 again. After the
      Setup screen reports that the upgrade is completed, choose
      restart. If you wish to perform the reconfiguration manually,
      follow the instructions below.
      
       1.  First, establish the preloading Stacker device driver. At
           the DOS prompt type: STACKER <enter>. You will see a Stacker
           drive map. Locate the line that reports the C drive. It will
           look something like this:
           Drive C was drive D at boot time [ D:\STACVOL.DSK = 123.4MB]
           Note the drive letter in brackets. In this case it is drive
           D.
       2.  Insert your Stacker disk # 1 into its drive, go to that
           drive and type:
           \TOOLS\REDBL drive:
           where drive: is the drive you noted above. Allow REDBL to
           establish the DBLSPACE.BIN  file.
       3.  Go back to the Stacker directory on the hard disk. Type:
           CONFIG <enter>. Answer "yes" when the program offers to
           create or modify your STACKER.INI file.
       4.  Open your CONFIG.SYS file by typing ED /C <enter>. You will
           see one or two Stacker lines that will look something like
           this:
           DEVICE=C:\STACKER\STACKER.COM
           DEVICE=C:\STACKER\SSWAP.COM
           Remove these lines by typing REM <space> at the beginning of
           each line. Add the new Stacker lines just above these lines.
           Type:
           DEVICE=C:\STACKER\DPMS.EXE
           DEVICEHIGH=C:\STACKER\STACHIGH.SYS
       5.  Press CTRL-Z to save the file.
       6.  Insert Stacker Disk # 1 into its drive and copy the files
           DPMS.EXE and STACHIGH.SYS to the STACKER directory on the
           hard drive. Also, copy the file STACKER2.BIN from Disk # 1
           to the root directory of the drive you noted in step one.
           For example, if Disk # 1 goes in drive A, your copy commands
           may look like this:
           COPY A:DPMS.EXE C:\STACKER <enter>
           COPY A:STACHIGH.SYS C:\STACKER <enter>
           COPY A:STACKER2.BIN D:\ <enter>
       7.  Restart the system for the changes to take effect.
           
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      Copyright 1994 Stac Electronics
