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STACKER NOTE                                                   STACKER NOTE
Title: Stacker and Windows Enhanced Mode.
STAC FAX Index #2201 - 6/29/92                          
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Background.

   Stacker is fully compatible with the 386 Enhanced mode of Windows.  
   However, some fine tuning is required to ensure optimum performance.  
   This note will assist in the configuration of Windows 3.0 and 3.1 in a 
   Stacker environment.
  
   I. Using the Stacker XT/8 Coprocessor
          
          If you are using the Stacker XT/8 coprocessor on a 386
          and plan to run Windows in 386 Enhanced Mode, you'll
          need to add an EMMExclude statement to the SYSTEM.INI
          file in your Windows directory.  Syntax:
          
               EMMExclude=<range>

          For example, if your XT/8 coprocessor base address is
          cc00, in the SYSTEM.INI file, add the following
          statement under the heading [386Enh]:
             
             EMMExclude=cc00-cfff
  
          The following table lists the seven possible memory
          ranges, based on the base address of the XT/8
          coprocessor card:
          
          Base Address   <range> to Exclude
          
          ------------   ------------------
          c400           c400-c7ff
          c800           c800-cbff
          cc00           cc00-cfff
          d000           d000-d3ff
          d400           d400-d7ff
          d800           d800-dbff
          dc00           dc00-dfff

      Note: The Stacker AT/16 card uses an exclusive I/O address so
      it requires no special treatment.
  
   II. Temporary Windows swap files
          
          If you are using a temporary Windows swap file, you can
          place the swap file on an uncompressed portion of your disk
          to reduce fragmentation of your Stacker drive.  Windows 
          3.1 is Stacker aware and will not give you the option of 
          placing it on the Stacker drive.  With Windows 3.0, 
          specify the swap file location by adding the following 
          line to the SYSTEM.INI file, located in your Windows 
          directory, under the heading [386Enh]:
             
             PagingDrive=<drive-letter>
          
          where <drive-letter> is an uncompressed drive with more
          than 2 MB of available disk space.  If the drive does
          not have this amount available, Windows will not operate
          properly.  If your uncompressed drive has less than 2 MB
          of available disk space, you can use SDEFRAG /G to make
          more uncompressed space available.
          
          For example, if drive C was your only drive before
          Stacker, installing Stacker creates drive D, which then
          becomes the uncompressed portion of your disk.  Use the
          following PagingDrive parameter.
             
             PagingDrive=D:
          
          NOTE:  If you built your Stacker drive by building an
                 empty Stacker drive, or if you have manually
                 removed the SSWAP command, then your uncompressed
                 drive may have a different letter.
  
   III. Permanent Windows swap files
          
          If you decide to use a permanent swap file (which must
          be on an uncompressed drive) after you've already
          created your Stacker drives, you may discover that you
          don't have enough room.  You can make more uncompressed
          space available by using SDEFRAG /G.
          
          If Windows still reports that there is not enough disk space, 
          even though it appears there is plenty, it may not be 
          contiguous.  In this case you'll have to unhide the Stacker 
          drive's STACVOL file and run a disk optimizer such as Norton 
          Speedisk or PCTOOLS Compress to make the space contiguous.  
          Use the following procedure:      
                    
            1. Make sure your disk optimization program exists on 
               the uncompressed drive or floppy.  Then, restart your 
               system from a clean boot diskette. (No Stacker device
               driver).       
                    
            2. Insert your Stacker diskette and type: 
                 
                 a:\SATTRIB -R -S -H c:\STACVOL.DSK
          
               where c: is the Stacker host drive letter.  
            
            3. Next, run the disk optimizer on the drive you wish to 
               host the permanent swap file.  
               
            4. Finally, rehide the STACVOL file with:  
                    
                a:\SATTRIB +R +S +H c:\STACVOL.DSK
            
            5. Reboot the machine from the hard disk.  You are now 
               ready to create the permanent swap file.
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Copyright 1992, STAC Electronics