I have a Police Force that came with a System 11 MPU and Road Kings ROMs. I know I read somewhere about using this board in a 11b game, but for the life of me, I cannot find the site.

I ordered the full EPROM set from That Pinball Place, which includes CPU ROM Set (U26 & U27, L-4 Sound ROM (U4), and the L-2 Speech ROM Set (U19, U21, U22). I wasn't sure I needed all of them, but better to be safe than sorry.

What do I need to do (if anything) to get the 11 board to work?

Thanks!

Thanks, it was Pinwiki!

I may look into selling it, if I could get enough to buy a 11b board, or a new Rottendog board.

Yeah, that's about what I've decided. The mod looks easy, and this board is acid free.

My only question is about the diodes, Pinwiki says to use 1N4735A 6v, 1w zener diode. My local Radioshack has a 5.1v, 1w zener, or a 12v, 1w. I would assume the 5.1v should work?

Actually, once I took the board out of the machine, I found someone had already did the diode mod.

I put the correct EPROMs in it, and she booted right up to attract mode!!