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Used by the routine at handle_sprite_types_18_1C.
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| L8A2D | 8A2D | LD A,(IX+$01) | Get polar y | |
| 8A30 | CP $F2 | If $F2 (-14) | ||
| 8A32 | JP Z,handle_out_of_screen | Then jump to handler | ||
| 8A35 | DEC (IX+$01) | Decrement polar y | ||
| 8A38 | INC (IX+$05) | Mark for pattern reload | ||
| 8A3B | RET | Return to return_from_sprite_handler | ||
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