Routines
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F047: Flip the shark so it's the right way round.
Used by the routines at F057 and F3AB.
F047 EXX Exchange main registers.
F048 XOR $01 Flip bit 1 in F046.
F04A LD ($F046),A
F04D LD DE,$88F8 Point DE at the shark graphic. (88F8)
F050 LD BC,$00C0 Set the size.
F053 CALL $81E3 Change the sprite to reverse direction.
F056 RET Return.
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