Routines
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C7B1: Nudge Object East West
Sets the adjustment of the speed in Y of an object, to bring it a step closer to the middle line of an arch that goes east and west.
Input
IX Address of the arch object
IY Address of the object
Step the object towards the east-west middle line.
NudgeObjectEastWest C7B1 LD A,(IX+$0A) Fetch the Y coordinate of the middle of the doorway.
C7B4 CP (IY+$02) Compare it with the Y coordinate of the object.
C7B7 JR Z,NudgeObjectsToArch_Restore Jump to NudgeObjectsToArch_Restore if the object is in the middle.
C7B9 LD A,$01 Set the adjustment to 01.
C7BB JR NC,NudgeObjectEastWest_Set Jump to NudgeObjectEastWest_Set if the object is south of the middle.
C7BD NEG Make the adjustment negative.
NudgeObjectEastWest_Set C7BF LD (IY+$0F),A Set the adjustment of the speed in Y of the object.
C7C2 JR NudgeObjectsToArch_Restore Jump to NudgeObjectsToArch_Restore.
View the equivalent code in;
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