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                                  UNZIP.COM                                   

             Size (recs) CRC   Version    Author/Latest Issue      Disk
               3k (23)   9A6A  1.5        Howard Goldstein 6/91    Z3COM8

  1- Syntax  2- Notes                                                         


   UNZIP dissolves MS-DOS .ZIP files.  
   
   Version 1.2 (7/3/90) by David Goodenough.
:1
    Syntax   UNZIP {dir:}zipfile {dir:}{afn}

   Under ZCPR3 "dir" can be a DU or DIR spec; otherwise, just a drive.   If no
destination is given, member files are checked and listed.   If  a destination
is given, member files are extracted if they match "afn" if  given,  otherwise
the entire ZIPfile is extracted.

   You can now abort with ^C  (and the partial output file,  if  any,  will be
closed and erased).  The usage screen now responds to "//".
:2
 UNZIP Notes - 1/2 

   a. UNZIP still needs a lot of work.   It really  ought  to  be  possible to
      extract member files selectively, but it's  all or nothing  at  present.
      In addition, listing files should be a lot  faster;  checking  CRC's  in
      that mode seems unnecessary.   Typing  a member file to the screen would
      also be a nice enhancement.  Maybe someone else will interested in going
      further.   In the meantime, Steve Greenberg's ZIPDIR and Carson Wilson's 
      ZTYPE can fill the gap.
      
   b. Version 1.5 updates (6/1/91, Howard Goldstein):
      - Fixed bug at WILDLP which was causing an output  spec of "dir:" not to
        work correctly.  
      - Corrected problems that were  causing  writes  to  disk  when  a  non-
        matching member file was being skipped.
      - Changed "disk full" logic to  close and  erase partial output file and
        abort the program immediately.  
      - Made several minor changes to allow assembly with ZMAC or M80.
 UNZIP Notes - 2/2 
 
   c. Version 1.4 updates (5/16/91, Bruce Morgen):
      - Bug-fix in ZCPR3 detection code at "setusr" 
      - Adds output filename specification with wildcards.   Now the use of an
        output d:/dir: and/or an output filename will  trigger  extract  mode.
        If the  output  filespec  contains  no  wildcards  (a d:/dir: alone is
        equivalent to "*.*"), UNZIP will now exit after the first extraction.

   d. Version 1.3 updates (5/12/91, Gene Pizzetta):
      - Some quick and dirty mods to make this utility more useful.  
      - Now assembles with SLR's Z80ASM and it's a little more orderly.
