Vertical and horizontal scroll settings from header:
$1411: Horizontal scroll settings from header flag. #$00 = Disable; #$01 = Enable.
$1412: Vertical scroll settings from header. #$00 = Disable; #$01 = Enable; #$02 = Enable if flying/climbing/etc.
Note that setting these to zero will merely disable the screen from scrolling within the player, as well checking the scroll limits to prevent it from escaping the level boundaries. It is disabled by auto-scroll sprite generators to prevent the code at $00F713 and $00F7F4 from interfering with the generator from moving the screen.
