Routines
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6f70: Initialise laser beam slot, and draw graphics.
Used by the routine at 6f5a.
Input
HL Address pointing to an unused laser beam.
6f70 ld (hl),$10 Set first byte to 16: "used"
6f72 inc hl Laser Y position
6f73 ld de,$5d00 DE=Jetman object
6f76 ld a,(de) B=direction in which to draw laser beam, based on Jetman movement action
6f77 ld b,a
6f78 inc de
6f79 ld a,(de) A=Jetman X position
6f7a and $f8
6f7c or $05
6f7e ld c,a C=laser beam X position
6f7f bit 6,b Shoot laser right if Jetman is facing right
6f81 jr z,$6fb6
6f83 sub $08 else shoot laser beam left
6f85 ld c,a C=Jetman X position - 8
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