Routines
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679C: Drop Worm
Used by the routines at MainGameLoop, Position_Worm_In_Beak and Handler_RedBird.
Drops the worm Percy is carrying.
Scans the room data for the collected worm marker (1E) and clears it back to 00 so the worm will reappear when the room is next redrawn.
DropWorm 679C LD BC,$0160 Set the search counter to 0160 in BC.
679F LD HL,$DE9E Point HL at Room_Object_Data.
DropWorm_SearchLoop 67A2 LD A,$1E Jump to DropWorm_Found if *HL equals 1E (found the collected worm marker).
67A4 CP (HL)
67A5 JR Z,DropWorm_Found
67A7 INC HL Advance to the next byte.
67A8 DEC BC Decrement BC and loop back to DropWorm_SearchLoop until all 0160 bytes are searched.
67A9 LD A,C
67AA OR B
67AB JR NZ,DropWorm_SearchLoop
67AD RET Return (no collected worm marker found).
DropWorm_Found 67AE LD (HL),$00 Write 00 to *HL to clear the collected marker.
67B0 JR Reset_Worm_State Jump to Reset_Worm_State.
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