> > 1) Seibu Cup Soccer > > This! I'm praying for someone to get this solved
still one of the trickier ones, I honestly don't expect even a decap to reveal much useful, it's some complex fixed-function type setup, with programmable function combinations.
based on previous guesses, it's probably not even an MCU, so while the results of decapping the various chips in that case might look pretty I don't actually think they'll bring us any closer to properly emulating it.
instead it will probably still require extensive tests on the board to work out all the functions.