river-raid: Routine at 7051

7051: Render fuel station

Renders a fuel station sprite at the specified X position. Fuel stations are static 2-tile wide (16 pixels) objects that the player can fly over to refuel.

Adds fuel station to viewport_slots active objects set
Sprite located at sprite_fuel (single frame, no animation)
Dimensions: 2 tiles wide (16px) × 25 pixels tall
Attributes: $0B (PAPER RIVER, INK FUEL)

Input
E	X position of fuel station

render_fuel

7051

LD B,$00

BC = (0, E): set X position in BC for object entry.

7053

LD C,E

7054

LD HL,$5F00

Add fuel station to active objects set.

7057

CALL add_object_to_set

705A

LD HL,$8A86

Load fuel sprite address sprite_fuel and call setup_object_position to set up screen position.

705D

CALL setup_object_position

7060

LD BC,$0000

Set sprite parameters: frame size=0, width=2 tiles, height=25 pixels, attributes=$0B.

7063

LD A,$02

7065

LD DE,$190B

7068

CALL render_sprite

Render fuel station sprite.

706B

RET