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I went on Saturday and was treated to a warm welcome and free drinks. Can't remember shovelling so many 10p's into the slots before in such a short space of time but the sounds of the machines were fantastic, with the 80's music on in the background it was just like the old days. I got a few jackpots and lost a few gambles too. Glad to have made the trip, even though the trains were terribly delayed. My favourite was the JPM bingo fruit machine, forget its name. I remember some of them being really tight and nothing has changed lol, those being Chances Unlimited, Road Runner, Frog Hop and Fruit Snapper. Adders and Ladders is probably my favourite MPU3 shorter cab machine. Just a shame there were no taller MPU3's like Fortune Numbers or Strike a Light. Was also hoping for some BFM original Cops and Robbers. Maybe they will come one day. Overall a very enjoyable visit and quite happy to waste a few quid indulging in my childhood memories. Hope to visit again in the future.

I'm so happy because the machine works. I put in place the three eprom of the second machine on the CPU of the first machine and every thing is OK. Now I just have to wait for my friend to copy the latest files on blank 2716 and the two machines will work (I hope so ) So, forget the "Regent 1 files" , they don't work, I don't know why and I think I will never know.

Had a play with it today and can say that it is worth the price. Took the ics out of Nippy Nudgers MPU1 and it failed the 6810 ram and was happy with both the 6820 pias and the 6800 cpu. I then got carried away testing a pile of old MOS CBM chip pulls i have (6502, 6510 etc). Still happy to have bought the retro chip tester as well, i think they each have their benefits. Think i might go to the pub now before i get too sad and carried away testing things for the hell of it.🤣

next up is some 80's old skool fun in the form of Naughty but Nice on Mpu3 Tech, Thanks goto @WonkySausage - images @wayfinder - layout used for lamping references @Pook - main reel symbols @pete_w - for the star and NN symbol Shortcuts are listed within the notes This machine accepts All coins including 1p's,2p's and 5p's not £2 coins as they weren't around when the machine was released Enjoy and HAPPY Gaming!!!! Naughty but Nice £3 Dx.zip

2 Job lots that look like they include some brand new connectors. Looks more like the triac plug than the power one. https://www.ebay.co.uk/itm/365966669642?_skw=365966669642&itmmeta=01K9WZGM156T0DQQWYT25CGTX1&hash=item553550374a:g:t9EAAeSwAJVo9TCR&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1e8NtF%2B8L2f4Q6XmZZcgnVOjWtYeHvMxfHm0f8pBjp%2FdMq41TO1Q1K3zhOeVcVAPqABFdrqH7HS8A1E4t%2FVwsivDKtYb68G8Emsn6QkOXIL200OLKW1buPVkjVB72MjElsK%2B%2B62qFAwxmTdLSULOgvtGCxuFBHzfdPM9ED6NTg7Le8cmiqHi%2FJq1SmVlCRJUpEsxJTxNtR21zULWcXqiq94QJGNwnmLaQ0fezIXjKRu4egpOB--vBaSf%2Bhjbhdc8Z9RPwxbEiY2Mb8yM3F32PGlgJ1qy8c%2BZr2rpGaJeZrKTw%3D%3D|tkp%3ABk9SR9bAwp_PZg

Thank you

The only set that I can see are Rev 2.1 which is what you are using. I'll have a sniff about to see if there are any earlier versions available 👍

Thank you for the fantastic layout.

Lovely stuff, thanks for this Vectra!

That’s why I didn’t buy them. had they been the power ones then maybe.

Ah OK. I know for sure that the diags won't even run if the 500Hz (500-660) is out of limits, not sure about games though but 487Hz would be enough out of spec. Both R68 and 69 should be changed as they go out of spec. The 0.1uF poly I have found needs to be selected to get the oscillator frequency correct. The % variation of this component (even new ones) is quite large and you may need to select one that puts the oscillator in range. Sometimes the 555 can be responsible and also C34 although not so often. Also make sure C32 is OK (0.1uF), I think you've already changed this. The waveform is square wave but it's not a 50/50% pulse width.

I have the logic files for the CPU card. I dont have the files for the export game card sadly...im happy to share them with yourself or Andrew. You can always try reading them too. IMO I dont think they're for security, I think the purpose is to keep the cards compact rather than having 6-12 extra logic ICs onboard.

I remade my own to do the same logic functions, I found originals to be security locked, but others have found some of them to be open

Good evening. So, to answer in order: To Midibob: I tested the components mentioned; they are OK. Next, to Northstar: Yes, when powered on, it goes into attract mode. No unusual flashing lights. The error occurs at the start point when the rollers spin. I've included some videos at the beginning (wrong dimensions; sorry). 1st video = power on 2nd video = attract mode + credit + subtract credit 3rd video = Stakes 1 to 10. Start, then error. IC6 on MPU3 manages AUX1 and 2. It might be different from MPU2. I'll keep the logic probe in mind; thank you. I'll see in the next few days whether I buy an oscilloscope or a probe, or both. In any case, thank you for your interest. 🙂 If you have any other ideas, Thank you.

Does the cabinet stay in attract mode when you start it? Are there any flashing lights, etc.? And does the error only occur during reel spin? I suspect a faulty PIA IC6. I've experienced the same thing, only with an MPU2. I use a scope or a simple logic probe. The logic probe can be connected to the 5V and 0V terminals on the MPU. Then you can test the IC's inputs and outputs. The LED flashes when an IC is active. If an IC is not active, the LED either doesn't light up or stays on.

I brought the backbit one useful piece of kit