By Jack B. Hardy
A ebook approximately writing experience video games in 3 diverse programming languages: Pilot, Microsoft simple, and Atari 8K easy
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Additional info for Adventures with the Atari
If I(n)=room #, then it adds I$(n) to a string called IT$ along with a comma. When the search is HALLS OF DEATH 49 over, it removes the last comma from the string. If IT$="" (nothing) then let IT$ = GNIHTON. Go to a subroutine to convert the coded message into something readable: 960 PRINT AT(2,10);"[inverse/12 spaces JITEMS I SEE:[11 spaces]":ITS="" 970 FOR T=1 TO 22:IF I(T)=R THEN ITS=I T$+" ,"+I$(T} 980 NEXT: IF IT$< >'''' THEN IT$=RI8HTS(IT $, LEN (IT$) -2} 990 IF ITS="" THEN ITS=" 8NIHTON" 1000 MS=IT$:PRINT AT(3,11);:80SUB 20:8 OTO 1020 Place the decoder subroutine near the beginning of the program.
1020 POKE 752,0:PRINT AT(2,16);"[inver verse / 10 spaces]BY YOUR COMMAND: [9 s paces]": INPUT CO$:POKE 752,I:Cl$="":C2 $="":03=0 The next line checks to see if user input is more than one letter. If it is, the program jumps to line 1210. If not, the program checks the next line to see if anything at all was entered. If nothing was entered, it enters a message into M$ and jumps to 1010. EM NOORAP[esc ctrl 2]":GOTO 1010 Line 1010 sends the program to the decoder subroutine, jumps to a subroutine to delay (timed by the length of the message) the program so the message can be read, then clears it from the screen and returns for more user input.
Dimensioning VOC$(20) would assign 20 different strings to the variable VOC$. ]. All item words, descriptions of all rooms, and all changing variable descriptions can also be stored in strings assigned to them . Halls of Death was designed with the aid of my good friend, Dave Simpson, who is responsible for introducing me to fantasy role-playing games. The program requires 32K with cassette or 48K with disk drive. You will note that many of the messages the HALLS OF DEATH 39 program relays are encrypted to make the game more fun to play.