;›; Listing #2›; by Stan Ockers›; for ANTIC The ATARI Resource›; a Vertical Blank Interrupt routine›; call from BASIC A=USR(1536)›;›	ORG	$600	; page six location›	PLA		; ignore parameter count›	LDY	#$0A	; lo-byte VBI routine›	LDX	#$06	; hi-byte VBI routine›	LDA	#07	; deferred VBI›	JMP	$E45C	; O.S. inserts VBI›VBI	LDA	#00	; zero ?›	CMP	$D0	; move flag plyr 0›	BEQ	SKP	; forget plyr 0›	INC	$CE	; one space right›	LDX	$CE	; update›	STX	$D000	; horiz pos. plyr 0›SKP	CMP	$D1	; mov flag 1 0 ?›	BEQ	OUT	; yes forget p1yr 1›	DEC	$CF	; one space left›	LDX	$CF	; update›	STX	$D001	; horiz pos. plyr I›OUT	JMP	$E462	; VBI exit thru O.S.›
