Routines
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39670: TriggerJonesAnim
Stops the Jones run animation: if not already frozen, XOR-blits the current frame once (removing the cat from the screen, since it was already drawn) and sets the freeze flag (bit 7 of JonesPhase). This entry point is used by the routines at 35814 and 36859.
39670 LD B,1 B = 1 iteration
39672 LD A,(39753) A = JonesPhase
39675 AND 128 test freeze flag (bit 7)
39677 RET NZ already frozen: do nothing
39678 CALL 39832 XOR the current cat frame (erases it)
39681 LD A,128
39683 LD (39753),A freeze: JonesPhase |= 128
39686 RET
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