Routines
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43757: Test Position Unchanged
Used by the routines at HandlerFlame, HandlerHippoWarthog, HandlerWanderingNastie, HandlerWulf, HandlerFlyingSabreman, ChooseTribesmanVelocity, HandlerRhino, PlayerMovement and GamePlay_Start.
Tests whether the position an actor has been moved to is the same as the position it started from.
Input
DE The new position of the actor (E is X and D is Y)
IX Actor record
Output
F Zero flag set if the position is the same as the position in the record
TestPositionUnchanged 43757 LD A,E Fetch the new X position of the actor.
43758 XOR (IX+3) Compare the new X position with the X position of the actor.
43761 RET NZ Return if the X positions are different.
43762 LD A,D Fetch the new Y position of the actor.
43763 XOR (IX+4) Compare the new Y position with the Y position of the actor.
43766 RET Return.
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