I'm trying to get a stern mpu 200 going in a big game for my buday. I'm a little confused about the rom configuration that came with the game though. It looks like u1 u2 and u5 are 8k chips with u6 being a 2716 eprom. Would this be factory, or has someone at some point swapped a 2716 in place of an 8k? The reason I ask is the mpu will flash 7 times but then lock up. No displays or anything. The scematic doesn't show this combo that I can see, and the jumpers are totally different for the 2716 according to the manual. I hope this makes sense. Before I start changing stuff around I wanted to see if anyone knows if this is correct.