NEW Bally -35 / Stern MPU-200 Repro boards

Hi Pinside,

I had new Repro MPUs for Bally -17 / -35 and Stern MPU100/MPU200 games made. The new board has upgrades over the original design that reduce the PCB size, complexity, and component count.

I used a 6802 CPU over the 6800 CPU which has allows for a simpler board layout. The 6802 has an internal clock circuitry which reduce the clock section to a crystal and two capacitors. This eliminates U16 and numerous passive components. The 6802 also has internal RAM which eliminates the U7 6810 RAM.

I used a reset controller device that simplifies the reset section to one component. No more 12v, no more super hot 82 ohm resistor, longer power on reset delay.

NVRAM! Board has SO28 and DIL28 pads for FM16(w)08(b) ferro tech NVRAMs. SRAM will purposely not work (no batteries!)

No complex jumper patterns. Right now 2732 EPROMs at U2 and U6 is the only EPROM setup. The only jumpers are six 'B' jumpers and six 'S' jumpers. When 'B' is in, the board is set for Bally -17, Bally -35, and Stern MPU-100. When 'S' is in the board is set to MPU-200. Bally clock speed is 0.5mhz, MPU-200 clock speed is 0.895mhz.

Board has a smaller size over the original. It mounts with the upper right grounding screw and 3 of the plastic stand offs.

Design has been testing for a month now and is solid. Price is $150 shipped. I will set up the board for your game.

The quantities are limited for this batch of repros. This is an ongoing project. I will be making revisions and enhancing the board. The $150 price point will likely go up on next board revision.

Few ideas for the future. Different single (larger) eprom and ram option(s). Open up the FM1608 for ram expansion for custom software. Solder it yourself DIY Kits. Working with a vendor to provide one click ordering of most the components needed to assemble the board. Smaller board layout. SMT version (even smaller pcb). Replacing all the logic gates with HC/HCT parts.

Message me if you want one.

Thank you
Andrew