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      STACKER NOTE                                         STACKER NOTE
             UPGRADING TO A DOS VERSION THAT SUPPORTS PRELOADING
                          (Applies to Stacker 4.0)
      STAC FAX  4306 (05-02-1994)
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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
      
          -Set up the new DOS version.
          -Set up Stacker as a preloading driver.
           
      Set up 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.
      
      Set up 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.
      
       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.  Change to the STACKER directory on the uncompressed drive you
           noted above and type:
           REDBL drive:
           where drive: is the same drive letter you are on (in this case
	   it is drive D). 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 two or more 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
           This assumes that the Stacker files have been installed on
           drive C.
       5.  Press CTRL-Z to save the file. Restart your system for the
           changes to take effect.
       
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      Copyright 1994 Stac Electronics
