Wheelie: Routine at 67E9

67E9: Controller: Scroll Playarea

Used by the routines at 6800, 6AAC, 6C00 and 6E18.
Controller_ScrollPlayarea	67E9	LD HL,$7814	Return if *7814 is not equal to 02.
	67EC	LD A,(HL)
	67ED	CP $02
	67EF	RET NZ
	67F0	LD (HL),$00	Write 00 to *HL.
	67F2	INC HL	Increment HL by one.
	67F3	LD A,(HL)	A=*HL.
	67F4	AND A	Return if A is zero.
	67F5	RET Z	Return if A is zero.
	67F6	LD (HL),$00	Write 00 to *HL.
	67F8	CP $02	Jump to 672E if A is equal to 02.
	67FA	JP Z,$672E	Jump to 672E if A is equal to 02.
	67FD	JP $678C	Jump to 678C.