I just received my new MPU from Rottendog. It's the newest version, fabricated in Mar 21.
I wanted to use it in my Data East Jurassic Park 1993.
I have an issue with the board. At first, there is an extra Pin at connector CN17. I removed the pin in agreement with Huperballs, the distributor for the Netherlands.
Then, after swapping the CPU and the Gamerom, I installed the MPU. And.... it makes the dino roar, but then nothing. Just the led 5v/Pia are lid. Nothing Else. The original MPU works but now and then it will reset or freezes.
Does anyone have experience with this new board and a Data East pin?
When i look at the new MPU there is a difference in the Lay-Out. It doesn't have the switch like the earlier MPU. Instead it has a soldered Jumper for 512 K and the other kind. Maybe it's meant to cut one Jumper?
Many thanks for the one who will respond on this topic.