Mine is oval button manufactured in July 1995. What's the big deal with the 21-pin thing? I had mine modded by ncsx.com, and they put a switch on the back for jap/us. Do you guys know if mine would be backup capable as well?
That's actually part of the problem. Oval button Saturns usually require 20 pin mod chips... which you just don't find anymore.
21 pin ones are usually circle button Saturns.
So a hybrid of 21 pin and oval buttons is a rare mix. Especially when you consider this board had the extra resistor and what-have-you needed for the access light. You can add one yourself, but that's not the point.