Routines
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30116: Check whether Sam is standing next to a fuse that has not been blown yet
Used by the routines at 29733 and 29866. Returns with the zero flag set if Sam is standing next to a fuse that has not been blown yet.
Input
H 230 (Sam)
30116 LD DE,29635 Point DE at the fuse location table at 29635
30119 LD L,2 Point HL at byte 2 of Sam's buffer
30121 LD BC,1537 B=6 (there are six fuses), C=1 (fuse identifier)
30124 LD A,(DE) A=y-coordinate of a fuse
30125 INC DE Point DE at the x-coordinate of the fuse
30126 CP (HL) Does the fuse's y-coordinate match Sam's y-coordinate?
30127 JR NZ,30140 Jump if not
30129 DEC L Point HL at byte 1 of Sam's buffer
30130 LD A,(DE) A=x-coordinate of the fuse
30131 CP (HL) Compare it with Sam's x-coordinate
30132 INC HL Point HL back at byte 2 of Sam's buffer
30133 JR NZ,30140 Jump unless Sam is standing next to the fuse
30135 LD A,(32694) Collect the fuse flags from 32694
30138 AND C Set the zero flag if the fuse has not been blown yet
30139 RET
30140 RLC C Move the fuse identifier bit in C leftwards
30142 INC DE Point DE at the next entry in the fuse location table
30143 DJNZ 30124 Jump back until all fuse locations have been checked
30145 RET
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