So the second trick looks like how the background layers work on systems like NES/Master System/SNES/Genesis. Just update tiles outside of the visible range and

So the second trick looks like how the background layers work on systems like NES/Master System/SNES/Genesis. Just update tiles outside of the visible range and just have the view window constantly looping around. Or am I missing something? I mean to do that on EGA is very neat (well duh!) considering those consoles all have dedicated VPU's for this task. Just wanted to make sure I am understanding it correctly.