(Topic ID: 227761)

Use Stern MPU100 in Bally -35 game


By arolden

1 year ago



Topic Stats

  • 9 posts
  • 2 Pinsiders participating
  • Latest reply 1 year ago by arolden
  • Topic is favorited by 1 Pinsider

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#1 1 year ago

Hi all

Trying to troubleshoot some issues with a Paragon. I have a spare Stern MPU100 board. I have read a lot about MPU100 and Bally -17 boards being compatible but not quite sure whether the -35 boards are also compatible. Is there a guide somewhere on how to reconfigure a MPU100 for use in Paragon?

Thanks for any tips

#2 1 year ago

It can be done, but you'd need to make permanent changes to the board (cutting traces, etc). See http://pinwiki.com/wiki/index.php?title=Bally/Stern#Bally_AS-2518-17_and_Stern_MPU-100_Jumper_Info

You can also make a 2764 daughterboard to do use in any -17/-35/stern board without any jumpering, I think (haven't tried this yet though): https://sites.google.com/site/allentownpinball/romblaster

#3 1 year ago
Quoted from zacaj:

It can be done, but you'd need to make permanent changes to the board (cutting traces, etc). See http://pinwiki.com/wiki/index.php?title=Bally/Stern#Bally_AS-2518-17_and_Stern_MPU-100_Jumper_Info
You can also make a 2764 daughterboard to do use in any -17/-35/stern board without any jumpering, I think (haven't tried this yet though): https://sites.google.com/site/allentownpinball/romblaster

Thanks. Looks like it requires more modification than I thought.

All I want to do is test that the MPU boots properly. Without the changes made to the MPU100, would it still boot in the Paragon? At least then I would be able to narrow the issue down to the MPU board.

#4 1 year ago
Quoted from arolden:

Thanks. Looks like it requires more modification than I thought.
All I want to do is test that the MPU boots properly. Without the changes made to the MPU100, would it still boot in the Paragon? At least then I would be able to narrow the issue down to the MPU board.

The MPU-100 (with its original ROMs) will boot fine in Paragon. All it needs to boot is the voltages coming in J4. You could fully hook it in too for more testing, but it might not interface with the sound board correctly, and the solenoids it fires won't make sense. If you unplug the sound board and remove the solenoid fuse on the playfield you should be fine for testing. Lamps will look a bit weird since the patterns won't line up, but that's fine

#5 1 year ago

Ok, I've fixed the MPU 100 but am still having issues with the Bally -35. Will the -35 board boot up in an MPU 100 without any jumper changes?

#6 1 year ago
Quoted from arolden:

Ok, I've fixed the MPU 100 but am still having issues with the Bally -35. Will the -35 board boot up in an MPU 100 without any jumper changes?

"in" an MPU-100?

#7 1 year ago

Sorry, I mean in an MPU 100 game

#8 1 year ago
Quoted from arolden:

Sorry, I mean in an MPU 100 game

Yep, same way as putting an MPU 100 on a 35 game. Jumper changes are only needed if you're changing the roms in the mpu board

#9 1 year ago
Quoted from zacaj:

Yep, same way as putting an MPU 100 on a 35 game. Jumper changes are only needed if you're changing the roms in the mpu board

Thanks - I didn't think you could get these boards to boot in different games at all without changing jumpers but it looks like you can. Good to know!

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