Routines
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C66A: Set Player Speed
Used by the routine at MovePlayer.
Gives the player a speed of three along the direction that it faces, after adding any speed that something else has pushed it with, which comes from the two bytes of the object that hold the push. Those bytes are also where arches write the nudge into a doorway. NudgeObjectsToArch uses SetPlayerSpeed_JumpByFacing with a different table.
Input
IX The address of the object
Add the doorway nudges.
SetPlayerSpeed C66A LD A,(IX+$09) Fetch the speed along the x axis.
C66D ADD A,(IX+$0E) Add the adjustment along x.
C670 LD (IX+$09),A Store the speed along the x axis.
C673 LD A,(IX+$0A) Fetch the speed along the y axis.
C676 ADD A,(IX+$0F) Add the adjustment along y.
C679 LD (IX+$0A),A Store the speed along the y axis.
C67C XOR A Write 00 to the adjustments along x and y.
C67D LD (IX+$0E),A
C680 LD (IX+$0F),A
Jump by the facing direction.
C683 LD BC,$C68D Take the table of the four routines that add the speed, WalkingRoutines.
This entry point is used by the routine at NudgeObjectsToArch.
SetPlayerSpeed_JumpByFacing C686 CALL GetFacingDirection Call GetFacingDirection to find out which way the player is facing.
C689 LD L,A Use the direction as the index into the table.
C68A JP RunGame_JumpViaTable Jump to RunGame_JumpViaTable to run the routine for the direction.
View the equivalent code in;
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