I have set mame to auto display correct aspect ratio, and I have set to enforce it. However, horizontals still fill the whole screen (such as SF2). In fact, I think all horizontals fill the screen. Surely there should be some borders down either side like for vertical games? It doesn't look stretched, in fact it looks superb, but I am wondering is it really displaying in its true aspect ratio? If not, is there a way to do it for all?