jetpac: Routine at 6fb6

6fb6: Shoots a laser beam to the right.

Once position of Jetman's gun is located, we call the draw laser beam routine. Used by the routine at 6f70.

Input
C	Jetman X position +/- a few pixels: 0-7 maybe?
DE	Address of Jetman X position variable.

Output
C	New X position of laser beam.

6fb6

ld a,(de)

Jetman X position

6fb7

and $07

Checking for any laser beam pixels?

6fb9

ld a,c

6fba

jr z,$6fbe

Increment X position if some laser pixels are set

6fbc

add a,$08

6fbe

add a,$10

Add 16 and reset bit-0

6fc0

and $fe

6fc2

ld c,a

Set return value

6fc3

Draw laser beam