Quick demo of fully-modded Stern “Trident” pinball with new rules and sound

After getting my Trident operational, I installed the BSOS system and have been working on fine-tuning the custom code and sounds. Here’s a short demo of what the new Arduino-based controller does to a standard Bally 18/35/Stern early solid state game.

Resources (courtesy Dick Hamill):

The code is all available on GitHub. It’s broken down into a base library and then machine-specific implementations. Rewriting other games requires a moderate knowledge of C/C++.

Here’s a suggested parts list. If you bought all these things, you could create 6 of these boards. If you don’t need that many boards, you might find cheaper ways to source smaller quantities. I haven’t done any work to figure out if this is the cheapest way to source any of this stuff.

Cheap Arduino knockoff x6 ($20.99) – needs CH340 driver for programming / has to be ATmega328P

0.1″ 40-pin connector (40 pieces for $7.99)

32-pin Prototype PCB (2 pack for $9.99) – this won’t work for Alltek or MPU-200 because they have a 34-pin connector

Wire ($7.99) – tons of wire

74125 – ($1.95) https://www.jameco.com/z/74125-Major-Brands-IC-74125-Quad-Tri-State-Bus-Buffer_49373.html

Boot switch – x2 ($8.99) this switch will work for activating the Arduino board and toggling the speaker (see the writeup here to find out why: https://ballysternos.github.io/install.html)


@RoyGBev has created a PCB and kit (doesn’t include the Arduino) here:

Prototyping A Brand New Mata Hari Ruleset!

I’ve been working on a new project that I’m very excited about. There’s been a movement to create an inexpensive, non-destructive and simple way to mod early Bally/Stern solid state games and add more features. In this video, I demonstrate an early prototype of the system used to modify a Bally Mata Hari pinball machine to include new features such as a skill shot, modes and even a wizard mode.

Want to learn more about this project? Visit: https://github.com/BallySternOS

Diagnosing gameplay issues on EM pinball machines (Target Pool)

This is a fun video that I think is quite informative. I go over the process of how I discovered a feature in the game was not working. It’s a good example of how even supposedly “fully-working” games are often not fully working and many people don’t realize.

So what do you do when you discover a play feature isn’t working? I go over how we can diagnose and identify/fix the problem, even without having schematics. Check it out!

Pinball Showcase: 1969 Gottlieb “Target Pool”

This is a very fun game that I recently dragged back to my house to work on. It was being a bit cranky and I finally got a chance to fiddle with it and get it working. I’m still tweaking it but wanted to do some gameplay videos. I forgot how really fun this game is. It’s all about nudging. This is one of the best games to learn the subtle art of nudgng on and widely regarded in pinball collection circles. Come see what the fuss is about..

Pinball Showcase: 1967 Gottlieb Hi-Score

This is a game I featured in episode #17 of pinball stories. A recent game I picked up and was sitting in my living room that I’ve been working on restoring. I finally got the game playable and wanted to do a test-stream of my camera rig so why not do a Pinball Showcase? What you have here is a portion of the live stream of me demo’ing the 1967 Gottlieb Hi-Score pinball machine. A surprisingly fun game to play, albeit a rather simple and shallow rule set.

In the video I explain the rule set but I wasn’t immediately able to figure out under what conditions the reward scale for the roulette wheel resets. After playing a few more times I figured it out. If you hit the max payout for A, B or C, it then resets, otherwise it will remember and carry over the current payoff scale from ball to ball AND player-to-player. So this means it’s possible for a player to steal the progress of another player for a larger roulette payout. That’s pretty cutthroat!

Thanks for watching and be sure to subscribe to my YouTube channel!

Jurassic Park (pro) – One Shot Pinball Review

We were lucky enough to get one of the first Jurassic Park pinball machines to our area, and thought it might be fun to post a quick video of gameplay. Our plan is to put this game right out in public on location so people can enjoy it while it’s brand new and nowhere else, so I was in a bit of a hurry to make the video – excuse the typos and verbal glitches (like calling the Pteradactyl ramp the Raptor ramp).

Anyway, enjoy my short review and first impression!

As a bonus, here’s another short video of additional gameplay where I pull out a really fun CHAOS multi-ball at the end of an otherwise crappy game.