Routines
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B3B0: The update routines for the last frame of a sparkle (graphics 65 and 55)
Graphic 65 is the end of the sparkle an extra life vanishes in (EXTRA_LIFE): it first clears the graphic of its place in PLACES, whose address is in +10 and +11, so the extra life is gone for good. A collapsing block (COLLAPSING_BLOCK) comes here too, with 0 in +10 and +11, and writes its zero into the ROM. Graphic 55, the end of a death's sparkle, comes in at SPARKLE_END. Either way the record becomes graphic 1, which the drawing empties when it next draws it, with a note pitched by the position. Knight Lore's upd_185_187.
Two more entries serve other routines: VANISH, which turns any object into graphic 1 (WANTED_VALVE, SOCKET_SPARKLE), and SOUND_AND_DRAW, a note pitched by U, V and Z and a redraw, the common end of many update routines.
Input
IX the object
SPARKLE_END_PLACE B3B0 LD L,(IX+$10) empty its place
B3B3 LD H,(IX+$11)
B3B6 LD (HL),$00
SPARKLE_END B3B8 CALL DRAW_AT_L12_D4 the drawing nudge (graphic 55's entry)
This entry point is used by the routines at WANTED_VALVE and SOCKET_SPARKLE.
VANISH B3BB LD (IX+$00),$01 graphic 1: gone when next drawn
This entry point is used by the routines at LOOSE_VALVE, SPARK_CHASER, PUSHABLE and EXTRA_LIFE.
SOUND_AND_DRAW B3BF CALL BEEP_BY_UVZ a note pitched by U, V and Z, and redraw it
B3C2 JP SET_WIPE_AND_DRAW_FLAGS
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