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909A: Move Object Back And Forth
Used by the routines at UpdateObject and UpdateType14.
Clears the byte at HorizontalStepSize and nudges the object, then reverses its speeds and updates its position. Purpose not yet known.
Input
IX Address of the object
MoveObjectBackAndForth 909A XOR A Clear HorizontalStepSize.
909B LD ($5C25),A
909E CALL NudgeObject Nudge the object.
90A1 CALL ReverseObjectSpeed Reverse the speeds of the object.
90A4 JP MoveObject Jump to MoveObject.
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