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      STACKER NOTE                                         STACKER NOTE
              USING THE STACKER CO-PROCESSOR CARD & STACKER 4.0
                          (Applies to Stacker 4.0)
      STAC FAX  4508 (02-18-1994)
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      BACKGROUND
      
      If your Stacker coprocessor was installed and working when you
      installed Stacker 4.0, you can set up Stacker to continue using
      it by following these instructions. The process is a bit
      different depending on whether you are using an operating system
      like MS-DOS 6 which preloads
      compression.
      
                                    Note
         Stac supplies the AT/16 LZS server file on the Stacker 4.0
      distribution disks. If you are using either the XT/8 or the MC/16
      coprocessor, you can obtain the appropriate server file from the
                     Stac BBS or from Stac on Compuserve
                
      SOLUTION
      
          Procedures if you are using MS-DOS 6, PC-DOS 6.1, or Novell
           DOS 7.
          Procedures for other DOS versions.
           
      Procedures if you are using MS-DOS 6, PC-DOS 6.1, or Novell DOS
      7.
      
      These DOS versions support preloading compression drivers. Note
      that PC-DOS 6.1 supports preloading only if its file dates are 9-
      30-93 or later. To continue using your Stacker coprocessor after
      installing Stacker 4.0, you need to determine the base address
      for your AT/16 coprocessor, add a line to your CONFIG.SYS file
      and restart your computer.
      
       1.  Determine the base address for the card by viewing your
           STACKER.INI file.
               a.  Change to your STACKER directory.
               b.  Type ED and choose STACKER.INI from the File menu.
               c.  Write down the number after the /B=. This is the
                   base address for your coprocessor. The possible base
                   addresses are:
                         200
                         220
                         240
                         260
                         280
                         2A0
                         2E0
       
                   You must use the same base address to ensure that your
                   coprocessor continues to function.
               d.  The /B switch has no effect in the STACKER.INI
                   file. Move the cursor to this line and press Delete
                   repeatedly to remove it.
               e.  Choose Save from the File menu to save the file.
       2.  Now edit your CONFIG.SYS file.
               a.  Choose CONFIG.SYS from ED's File menu.
               b.  Type the following line immediately before the line
                   that begins with "DEVICEHIGH." and ends with 
                   "STACHIGH.SYS":
                   DEVICE = C:\STACKER\LZS_AT16.SYS /B=base address
                   where base address is the number from the /B line.
               c.  Choose Save from the File menu and then choose
                   Exit.
       3.  Restart your computer to put the change into effect.
           
      Procedures for other DOS versions.
      
      To use your installed and previously working Stacker coprocessor
      with Stacker 4.0, run Stacker Setup as usual. Stacker will
      continue to use the coprocessor.
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      Copyright 1994 Stac Electronics