Z I L C H  S C R E E N  E D I T O R
                    ===================================






          Zilch is a screen editor which can display and edit one  or  more
     files at a time.  The file(s) being edited are displayed on a terminal
     and the screen is updated as changes are made to the files.  Zilch has
     several features which make it a very powerful editor:

     1.  Multiple files may be displayed and edited at the same time.

     2.  Zilch saves an editing session when it exits so that  the  session
         can be continued at a later date.

     3.  Zilch checkpoints an editing session after every 300  commands  in
         case of a system crash.

     4.  A  macro  may  be  defined  to  execute  repetitive  sequences  of
         keystrokes.

     5.  Special programming language specific character  mappings  may  be
         used   to   abbreviate  commonly  typed  words  and  do  automatic
         indentation.

     6.  Zilch can spawn a subprocess to enter DCL  and  can  redirect  the
         output of DCL commands to an internal buffer.


          Zilch is descended from several editors.  Character mappings were
     first implemented by Bob Stodola on a Hewlett-Packard computer at ICR.
     Many of the commands emulate the commands of Bill Cael's  Teco  screen
     editor  at  ICR.   Many  other  ideas,  such  as editing and windowing
     multiple files, come from the EMACS editor.

          Zilch works on  VT100,  VT52,  ADM3A,  and  ADM5  terminals.   By
     default  Zilch  assumes your terminal is a VT100 or VT52 if the system
     terminal type (as displayed by the SHOW TERMINAL command) is VT100  or
     VT52,  respectively.   Otherwise  Zilch  assumes  your  terminal is an
     ADM3A.  To use an ADM5, /TERM=ADM5  should  be  specified  on  Zilch's
     command line, for example:

          $ zilch/term=adm5 file.dat


          Complete  documentation  is  in  ZILCH.DOC.   Typing  ZCAI  INTRO
     invokes  an  interactive  beginner's  tutorial on using Zilch.  Typing
     ZCAI  ADVANCED  invokes  an  advanced   tutorial   on   using   Zilch.
     Documentation for the tutorials is in ZCAI.DOC.  A VMS help file is in
     ZILCH.HLP.

          Zilch has several files which it reads in response  to  commands.
     They  are  the  mapping  character  files and the help file.  They are
     included on the ICR root directory.  The names of these files must  be
                                                                     Page 2


     specified  on  Zilch's command line.  Please see the LOGIN.COM file in
     the ICR root directory to see an example  of  setting  up  the  symbol
     definition for Zilch properly.


     Please address comments, bugs, and suggestions to:


          William P. Wood, Jr.
          Institute For Cancer Research
          7701 Burholme Ave.
          Philadelphia, Pa. 19111
          (215) 728-2760