Routines
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687B: Display Lives
Used by the routine at CreateWindow.
Draws one car icon in the bottom row of the sidebar for each life remaining in Player_Lives.
Before After
display-lives-before display-lives-after
DisplayPlayerLives 687B LD A,($5E3D) Return if there are no lives left (Player_Lives).
687E AND A
687F RET Z
6880 LD B,A Set the lives counter to the number of lives (Player_Lives).
6881 LD HL,$BC08 HL=BC08 (pixel co-ordinates: H is the Y position and L is the X position of the first car).
6884 XOR A Write 00 to NewSpriteShift.
6885 LD ($5E41),A
DisplayPlayerLives_Loop 6888 LD DE,$7CD6 Point DE at the car sprite (Sprite_Car_1).
688B CALL DisplayPlayerLives_Print Print a car using DisplayPlayerLives_Print.
688E DJNZ DisplayPlayerLives_Loop Decrease the lives counter by one and loop back to DisplayPlayerLives_Loop until a car has been shown for every life.
6890 RET Return.
Print the player sprite.
DisplayPlayerLives_Print 6891 PUSH BC Stash the lives counter and the pixel co-ordinates on the stack.
6892 PUSH HL
6893 CALL PrepareActorSprite_Shift Call PrepareActorSprite_Shift to set up the sprite at the co-ordinates in HL.
6896 CALL DrawEntity_NoOldSprite Call DrawEntity_NoOldSprite to draw the sprite.
6899 POP HL Restore the pixel co-ordinates and the lives counter from the stack.
689A POP BC
Move onto the next life "slot".
689B LD A,L Add 10 to the X position, ready for the next car.
689C ADD A,$10
689E LD L,A
689F RET Return.
View the equivalent code in;
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