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7302: Set Custard Vertical Speed
Used by the routine at HandleCustard.
Part of HandleCustard, used while the custard is still entering from the right of the screen. Gives the actor a random vertical speed (02 or FE), and then only moves it horizontally.
Input
IX Actor
SetCustardVerticalSpeed 7302 LD A,R Fetch a random number.
7304 AND %00000100 Keep only bit 2.
7306 SUB $02 Subtract 02 so that the speed is FE or 02.
7308 LD (IX+$05),A Update the vertical speed.
730B JR MoveBouncingActor_Horizontal Jump to MoveBouncingActor_Horizontal.
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