Got "under the hood". The power supply goes directly into the board and not through the harness, but it is definatley Jamma. I'm sure this could be modified, but I am going to leave it as is. As far as the board goes, it is running off a flash card and I have not yet found a way to change the settings on the games (most likely its not possible). However it is tons of fun and well worth what I paid for it.