INFO                                                       version 1/1992
  
                       PROGRAMMING NOTES   


 MAIN VARIABLES
                                           fixed by menu

A%     room number    -------------------------  *
E%(O%) location of object O%    
F%     number of objects carried  -------------  *
H%     number of objects in room
J%     area code
K%     action control
L%     number of objects (fixed!)
M%     verb number
N%     action control
O%     object number
P%     number of rooms (fixed!) 
Q%     number of verbs (fixed!)
R%     credit         -------------------------  *
S%     action control
T%     state of ammunition   ------------------  *
U%     rifle location     ---------------------  *
V%     credit card location   -----------------  *
W%     location of autocopter -----------------  *
X%     location of launch   -------------------  *
Z%     destination in next program  -----------  *
       (values <51 reserved for menu)

                                       
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STANDARD PROGRAM LAYOUT
                       
   
 From MENU  -->---->  INTRODUCTION
                           Setup >--< DATA & PROCs
                           |
         |---->------>  INPUT    
         |                 Keywords   ------------>----------->|
         |                 Direction                           |
         |                 Direction obstructions   -->------->|
         |                 Destination  >--< DATA              |
         |<----<---------  Destination obstructions  -->------>|
         |                 |                                   |
         |              PARSER <-->DATA                        |
         |                 verb+object   -------->------------>|
         |                                                     |
         |                                                     |
         |<----<------  RESPONSE(or ROUTINE) <-----------------|
                           |                                   
  To MENU <----<------  DEPARTURES 
                                            
        
                        DATA STORE

                        PROCEDURES


    The program layout has been deliberately kept very simple so that it is
easy to follow and modify even after the passage of some time.    This was
particularly necessary in the later BBC-B days when there was no room for
spaces or REMS!.    This has resulted in more GOTOs than purists would
approve !.   The programs should always be run from the menu so that the
resident integer variables are correctly set.    
                      
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ADJUSTMENTS TO PLAY VERSION

1 Various routines used in play testing are deleted.  Details are noted at
  the end of ADV (line 65110).

2 The 'Solutions' text file is omitted for obvious reasons !


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FUTURE DEVELOPMENTS

 Fine tuning of the whole which is still only the framework for a really
celebral adventure.

 Any new programs should be accessed from (or via using Z%) the MENU to
ensure that the resident integer variables are correctly set.      


                                             
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