
   SYSTEM REQUIREMENTS
   
     PC or PC emulator running Windows95 or higher.  
     5 Mb disk space.  
     An 800 x 600 or greater 24 bit display.  
     

   SPEED

     The 'benchmark' simulation provided should take 30s 
     to run on a Pentium 500 with a screen resolution 
     of 1024 x768.

   USAGE

     The program may be freely downloaded and used for 
     personal and educational purposes.  It must not be
     altered or redistributed.  Published results and
     simulations should quote in captions the program 
     and the website URL 

     "www.sundog.clara.co.uk/atoptics/phenom.htm"

     Commercial copying or distribution is forbidden.

     Copyright L Cowley & M Schroeder.  All rights reserved.   

   
   INSTALLATION 

     If you are reading this the chances are that you 
     have already successfully installed the software.
     However, for the the record ...

     EXISTING USERS

        If you have already installed an earlier version 
        of HALOSIM then just download the much smaller 
        UPGRADE PACK.
 
        To install the upgrade, simple unzip HAL3UP.ZIP
        into a folder of choice.

        Installation of HALOSIM3.x will not interfere with the 
        operation of earlier versions.

   

     NEW USERS

   1.  Download "halosim3.zip" from 
       www.sundog.clara.co.uk/halo/downld.htm   

   2.  EXTRACT (DO NOT RUN) into a temporary folder of 
       any name and location.

   3.  RUN the file "setup.exe".

   4.  Follow the screen instructions.   

       The set up program will suggest a location for 
       the program but any other location may be selected 
       instead.

       The set up program places all the program and data
       files in the selected directory.   It also places
       some standard system files in C:\Windows\system\.  

   5.  Create a desktop shortcut to HALOSIM3.EXE

   6.  HALOSIM is then ready to use.

   7.  All the HALOSIM files (and any extra ones created) 
       MUST be stored in the same folder.  



   STARTING AND LEAVING THE PROGRAM

   1.  Double click the HALOSIM desktop icon or double click 
       HALOSIM3.EXE in an Explorer window.

   2.  A splash screen will show.  It can be removed by 
       clicking on it or waiting a few seconds.

   3.  The 'Control Panel' will then appear.

   4.  Leave the program by the upper right hand window 
       exit button or via the Menu 'File' 'Exit'.


   COMPATIBILITY WITH EARLIER VERSIONS

   HALOSIM3 should run all files from earlier versions.   The
   results will be at least as accurate and the simulations
   better.   Stored simulation files made by version 3 will 
   NOT run on earlier versions.


   UNINSTALLING HALO

   1. Double click 'My Computer'

   2. Double click 'Control Panel'

   3. Double click 'Add/Remove programs properties'

   4. Click 'Halo'

   5. Click 'Add/remove'






