Routines
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58185: Get Random Number
Used by the routines at InitialiseGame, AnimalsEventTiming, Handler_BadDoor and Controller_BombCheck.
Output
A The random number
(((B + C) % 256 + 171) % 256) * 256 + (C + 205) % 256
GetRandomNumber 58185 PUSH BC Stash BC on the stack.
58186 LD BC,(62275) BC=*RandomNumberSeed.
58190 XOR A Reset the flags.
58191 LD A,C B=B+C.
58192 ADD A,B
58193 LD B,A
58194 XOR A Reset the flags.
58195 LD A,205 C=205+C.
58197 ADD A,C
58198 LD C,A
58199 LD A,171 B+=171.
58201 ADC A,B
58202 LD B,A
58203 LD (62275),BC Write the updated BC backit to *RandomNumberSeed.
58207 POP BC Restore BC from the stack.
58208 RET Return.
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