Underworld

UNDERWORLD


by David Naylor


from ZX Computing June 1986








Underworld is an adventure for the 48K Spectrum, in which you have


been stranded on the island of Brannal. The only way for you to escape


is to collect the five Keys of Time and take them to the Keeper of


Time who will enable you to escape. The only problem is that the Keys


are in the possession of the Dark Lord and his followers who rule the


island, and naturally they're none too keen on letting you get away


...





The trouble with typing in adventure game listings is that by reading


the listing you often get a good idea of how to complete the game,


which obviously takes away half the fun. But with Underworld, David


Naylor has provided a machine code 'scramble' routine which jumbled up


all the text in the game before the listing was printed. The


'unscramble' routine is contained in the Basic loader (listing 1), so


you can type in the scrambled listing without seeing the solutions to


all the problems and then the loader program will unscramble it for


you when you actually start to play the game.








Listing 1





This is the Basic loader containing the 'unscrambling' routine. Type


this in (ignoring line 0) and SAVE it before RUNning it. To check the


program add this line: 85 STOP. Then RUN it. The checksum will tell


you if any errors have been made, and if it's all OK you will see "9


STOP statement 85:1" come up on screen. When that happens delete line


85 and SAVE the program again with SAVE "UNDERWORLD" LINE 1 - this is


the final loader for use with the finished game.








Listing 2





This is the main game program which has been scrambled to stop you


from seeing all the solutions. Be very careful to enter the scrambled


text correctly as it can only be 'descrambled' properly if it's been


entered correctly.








Printer problems





David has used certain codes in the game which don't show up on a


printer. The first of these is the copyright symbol ((c)) which has


been replaced in the listing by a plus sign (+). So, where a REM


statement tells you to "see text" this means that any plus signs in


the following line should be replaced by the copyright symbol.





There are also a number of 'inverse' commands in the listing in the


following lines, where text has to be typed-in in inverse mode.


These are:


1082 all the text between quotation marks


9522 the text between '+' signs


9580 XIBU


9962/3 UIBU


9970 XIBU


To enter inverse mode, press Caps Shift and 4, enter the relevant


piece of text and then press Caps Shift and 3 to return to normal


mode.








--


Another Fine Product transcribed by:


Jim Grimwood, Weardale, England (http://www.users.globalnet.co.uk/~jimg/)


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