Routines
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6272: Move Marker Up
Used by the routine at MoveMarker.
Moves the marker of one player up by four pixels.
Input
IX The record of the marker (see MarkerRecords)
MoveMarkerUp 6272 LD A,(IX+$01) Fetch the vertical position of the marker.
6275 SUB $04 Subtract 04 from it.
6277 LD (IX+$01),A Store the new position.
627A RET Return.
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