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Routines |
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Called from the main loop at 25129.
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26017 | LD A,(31865) | Pick up the tunnel timer. | ||||||
26020 | AND A | Is Horace in a tunnel? | ||||||
26021 | RET NZ | Return if so. | ||||||
26022 | LD HL,(31853) | Pick up Horace's new location. | ||||||
26025 | CALL 27680 | Check the attribute bytes at this location. | ||||||
26028 | RET Z | Return if there's nothing to eat there. | ||||||
26029 | CP 60 | Has Horace run into a flower? | ||||||
26031 | JR NZ,26045 | Jump if not. | ||||||
26033 | LD HL,(31859) | Add 10 to the score (Horace has eaten a flower). | ||||||
26036 | LD BC,10 | |||||||
26039 | ADD HL,BC | |||||||
26040 | LD (31859),HL | |||||||
26043 | JR 26055 | |||||||
26045 | LD HL,(31859) | Add 50 to the score (Horace has eaten a cherry or strawberry). | ||||||
26048 | LD BC,50 | |||||||
26051 | ADD HL,BC | |||||||
26052 | LD (31859),HL | |||||||
This entry point is used by the routines at 24576 (when initialising a maze), 26276 (when Horace has thrown the guards out of the park) and 26730 (when Horace has sounded the alarm).
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26055 | LD DE,16384 | Set DE to the display file address for the score (in a roundabout way). | ||||||
26058 | EX DE,HL | |||||||
26059 | LD BC,15 | |||||||
26062 | ADD HL,BC | |||||||
26063 | EX DE,HL | |||||||
26064 | CALL 27425 | Print the score. | ||||||
26067 | LD HL,(31859) | Pick up the current score. | ||||||
26070 | XOR A | Clear the carry flag and set A=0. | ||||||
26071 | LD BC,10000 | Perform trial subtractions of 10000 from the score. | ||||||
26074 | INC A | |||||||
26075 | SBC HL,BC | |||||||
26077 | JR NC,26074 | |||||||
26079 | INC A | This should be DEC A. | ||||||
26080 | LD B,A | Now B=INT(Score/10000)+2. | ||||||
26081 | LD A,(31863) | Pick up the extra life indicator. | ||||||
26084 | CP B | Is it time to award an extra life? | ||||||
26085 | JR Z,26113 | Jump if not. | ||||||
26087 | LD A,B | Update the extra life indicator. | ||||||
26088 | LD (31863),A | |||||||
26091 | LD A,(31864) | Increment the number of lives. | ||||||
26094 | INC A | |||||||
26095 | LD (31864),A | |||||||
26098 | LD HL,16391 | This is the display file address for the number of lives. | ||||||
26101 | CALL 27663 | Set HL' to the corresponding attribute file address (unnecessarily). | ||||||
26104 | LD A,(31864) | Pick up the number of lives remaining. | ||||||
26107 | ADD A,"0" | Convert it into an ASCII code. This does not work if there are 10 or more lives remaining, which is a bug. | ||||||
26109 | EX DE,HL | Transfer the display file address to DE. | ||||||
26110 | CALL 27471 | Print the number of lives remaining. | ||||||
26113 | LD HL,31849 | Pick up the sound on/off indicator. | ||||||
26116 | LD C,16 | Initialise C for the loop that follows. | ||||||
26118 | PUSH BC | Save the loop counter (unnecessarily). | ||||||
26119 | LD B,C | Set B equal to 8*C. This value determines the pitch. | ||||||
26120 | SLA B | |||||||
26122 | SLA B | |||||||
26124 | SLA B | |||||||
26126 | PUSH BC | Save the pitch parameter briefly. | ||||||
26127 | LD A,31 | Flip the speaker off if the sound on/off indicator is on, or on otherwise. | ||||||
26129 | AND (HL) | |||||||
26130 | OUT (254),A | |||||||
26132 | DJNZ 26132 | Produce a short delay. | ||||||
26134 | LD A,7 | Flip the speaker on. | ||||||
26136 | OUT (254),A | |||||||
26138 | POP BC | Restore the pitch parameter to B. | ||||||
26139 | DJNZ 26139 | Produce another short delay. | ||||||
26141 | POP BC | Restore the loop counter to C (unnecessarily). | ||||||
26142 | DEC C | Finished yet? | ||||||
26143 | JR NZ,26118 | Jump back if not. | ||||||
26145 | RET |
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