The ram and battery will however remember the last state it was in. I can play for a good 15 minutes and all the ram-resident counters will remain at 000 000. I have to reset the CPU to release the handle.ĥ) None of the counters are working. The bulb reads continuity still but no power is getting to it.Ĥ) self-correcting tilts (like the one above) according to the manual should release the arm to replay but it does not. It's non-existant according to the documentation, but *4- (where * represents one of the three reels) does and indicates that while indexing a reel spun backwards.ģ) Also notice the TILT lamp is no longer on. If that fails well then I have no choice but to consider the game chip bad and have HMS make up a new one for $85USD.which will be fin in its own way because the form you have to fill out assumes the traditional fruits, bars and bells, This whole money value for lines is the weirdest thing I have ever seen.Ģ) For the first five minutes or so after I turn the machine on I get games interrupted by tilt code -4- after the first or second reel indexes and locks. HMS electronics sells them still for $35USD each, which is probably why I couldn't find an image. So far at least it appears intact but unless someone says otherwise, I'm not posting it here for review.

Still freaked out.Īt this point I've also managed to disassemble the game chip code which is straightforward MCS-48 assembly. My theory is it should start to do something and then fail because if the game code needs 128 x 8 ram space and should at least hang. It's electrically identical but has half the internal ram. I dug through my box of junk and found an Intel P8035L microcontroller. Instead it just continues throwing garbage at me. I should at the very least see a tilt code.

I noticed that if I just pull the relay board I can shut everything but the three digit display on the front up and the display can turn out to be handy for diagnosing if it's still losing its mind or not. I'm seeing this done to other boards and should be sufficient. The battery has been substituted with a 3.6V rechargeable pack from a cordless phone. Replaced transistor on speculation that a 2N3904 should be close enough to the original spec.

Summit slot machine code