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Gentlefolk, I've uploaded a new set of ROMs for Barcrest's Royal Exchange. The original imposed a gamble limit of £20 for all initial wins less than that. The new version will allow a gamble of the current win up to a maximum of £100. Here, I've attached a Word document explaining how this was achieved for all folk who, like me, used to think "How did they do that?!". Please be aware that it is not for the faint-hearted 😊 I'd like to thank chris217 for reintroducing me to the wonderful world of 1980s fruit machines, Sulzer Ned for drawing my attention to the idea the the emulated ROMs can be tinkered with and Eddie Coxon, who advised me of the programming language used and provided me with a huge manual and lots of helpful advice and hints. Now that you all know exactly whom to blame, I hope you enjoy the new version together with this documentation. Best wishes, Bernard ROYAL EXCHANGE GAMBLE BLOCK REMOVAL.docx

I had a go at making some replacement backlit bands for Tensation a couple of years ago. They came out pretty good, but it was a lot of time and effort. Sadly, I no longer have access to the printer.

****************************************** Bingo Bell ****************************************** Manufacturer - Bell-Fruit (token version) Stake - 5p or 5p token a game; 10p a game and a 5p token change Wins - 2 to 5 tokens; any 2 lines pay 5 ****************************************** The game starts on the coin and spins the reels three times; numbers on the payline go to the card. Then two nudges (one number each), or collect, or another coin. ****************************************** Shortcuts... 7 - Enter 5p 8 - Enter 10p 0 - Enter 5p token 1-3 - Nudge reel 1-3 Space - Collect ****************************************** Artwork redrawn from photographs of the machine; reel bands partly from photographs, Circuit from Bell-Fruit's service manual (no wiring diagram). ****************************************** Layout by Pete Walton Thanks to the MPU Mecca for the resources ****************************************** Bingo_Bell_v2.zip

Nifty Fifty (MPU4) – Solid Silver minimum £1 mod I have a Barcrest Nifty Fifty (checksum-removed) ROM. The Solid Silver feature (triggered by three 50p symbols) used to be able to award 50p. I wanted the minimum award to be £1 while leaving the feature start, lamps, animation, and the rest of the payout logic untouched. Two prize tables were patched: Table at $9C28 Table at $9496 All leading 01 entries in both tables were changed to 02. This forces the lowest possible Solid Silver prize to £1. The file is based on the existing checksum-removed master so no checksum is re-introduced. The working version is: Nifty Fifty - Grok - V4 - Solid Silver Min Pound WhatsApp Video 2026-10-18 at 00.26.25.mp4 NIFTY GROK 4 PROM 1 - 27256.bin NIFTY GROK 4 PROM 2 - 2764.bin

Here is my STOP THE CLOCK modded roms 1: all cash 3 pounds 2: nudge block uncapped to 12 nudges on random stop 3: character and checksum removed (so you can make a spare card like i did) MOD 7B - CHARACTER REMOVED - TO BURN TO EPROMS.zip

Does anyone have any other Summit Coin roms ? I Have Ultimate Nudge already, I am got the tech running on my JFruit emulator. If you are interested you can try it at Click to Play Ultimate Nudge

I am happy to present to you my MPU 1 Emulation as part of the JFruit Emulator. with thanks to the MPU Mecca for the resources Play Big Apple Play Golden Nudge It Play Lucky Nudge Play Match It Play Match Up

Ace System 100 - Early 1980s Clubbers, with thanks to the MPU Mecca for the resources Silver Machine Rainbows End

Thank you. I appreciate it's tough going but I hope it will be useful for someone. These gambling blocks seem to annoy everyone these days! Back in the day, they probably saved a lot of people some money 😄

well done bernard. i will probably do NIFTY 50 today to rid the petty 50p on the solid silver so you at least win a pound. I unblocked the nudges and cash prize on STOP THE CLOCK so the nudges go to 12. it so far runs good. I think the club machine blocks were more aimed at the DOUBLE OR NOTHING gambles so the machines didnt get smashed up. can you imagine having 50 quid and do a double all or nothing and it lands on lose

MDM 1981

Pinball Heaven stock them on eBay. https://www.ebay.co.uk/itm/371532527747

I’ve had a bit of time again, this time to work on the mechanism control sequence timer. This one was also covered in rust and grime. The gearbox was almost seized up; I could barely turn it by hand, but luckily a bit of penetrating oil did the trick. That could easily have cost me the motor. I’ve also started dismantling the door; I’d already taken it off. So that various parts can be soaked in cleaning vinegar.

It was time to clean the credit count sequence timer; it was dirty and covered in rust. It was quite a job to get it apart. Fortunately, I’d already replaced the AMP plugs on the switches. After a thorough clean, something wasn’t quite right when I was putting it back together – I kept losing the screws from the switch terminals. It turned out I’d turned the 4-sided rod the wrong way round, which meant the screws didn’t fit. So I took it apart again and paid close attention this time. Some new bulbs (6V 2W) had also arrived, so I replaced them straight away. I also fitted new film capacitors for the RC snubbers. The old ones were already starting to crack and their capacitance was barely there.

this has tonight interested me to look at what i did years ago, it was definitely a ball ache to change the codes manually which resulted in burning a useless chip that wouldn't work in a machine and of course just loosing the cost of the chips which are becoming more difficult to find. so I have started with AI tonight to do a program which askes for the code needed and insets in into the right place in my original code. this would then make it much easier to produce correct chips as there is no where to get them made these days. so if needed i may be able to make them in the future

Gentlefolk, Thank you for your interest in the removal of the Royal Exchange gamble block. It's encouraged me to post a similar document detailing how I did the same for Stake Up (and Multiplay) about six months ago, for all those who are interested in the inner workings of these machines. They made no effort to consider what you would win if your double-or-nothing gamble succeeded; they were, quite literally, a random 50-50 win or lose. The programmers were probably happy with this as the gambles were limited to £10 so nothing too calamitous would happen. With the new ROMs, of course, it could discover that it has paid £100! These were MPU4 machines and they used Motorola's 6809 code. Although this was built on the 6800 code which was used for the MPU3 machines, it is an order of magnitude more difficult to fathom. Do please bear this in mind if you look through the attached document; it is very much written for coders! Many thanks again for your interest and comments, Bernard STAKE UP AND MULTIPLAY GAMBLE BLOCK REMOVAL.docx

Thank you for posting, this is a very interesting read and extremely informative.

****************************************** Lucky Horseshoes by Pete Walton ****************************************** Manufacturer - JPM (1978, drawing 1534) Stake - 5p, 2 plays 10p or 10p token Jackpot - £1 (paid in tokens) ****************************************** Shortcuts... 7 - Enter 5p 8 - Enter 10p 0 - Enter 10p token 9 - Enter 50p for change 1-3 - Holds X - Hold cancel Space - Start (and feature start) ****************************************** Artwork redrawn from photographs of the machine; Circuit from JPM's wiring diagram 1534. ****************************************** With thanks to the MPU Mecca for the resources Lucky Horseshoes.zip

Posted 2 minutes ago · IP (edited) Brenco - The Mint (Electro Mechanical) ****************************************** The Mint by Pete Walton ****************************************** Manufacturer - Brenco Stake - 2p one play, 10p five plays Top award - 25p Gold award token ****************************************** Shortcuts... 7 - Enter 2p 0 - Enter 10p 1-3 - Holds M - Mint Space - Start ****************************************** Artwork redrawn from photographs of the machine; reel strips from photographs of parts of them. Circuit from Brenco's schematic and service sheets; cam timings designed. ****************************************** Thanks to the MPU Mecca for the Schematics Download for MFME The Mint.zip or play now in JFruit

Nifty Nudge Play Nifty Nudge

Yes i would love to have met someone who programmed them. My son designs games for children online and he has a programmer that makes the software. I am pretty sure i was told 20 years ago that the same guy that designed both SMASH AND GRAB and BIG SHOT moved to the states. There was also easter eggs programmed into alot of these so the programmers would go around the country if they lost their jobs and canned them. I think i heard an ACE prgrammer got caught out. Would have loved to have been about then. I was only 14 when sag came out , i was in the industry but was told i would never learn how to break into these programs. I said "HOLD MY BEER"

Its sounds good bernard but if you remove the gain code then what would happen on unlimited nudges 🤔. Id hate to fluff the jackpot and then think it doesn't matter as gain will nudge the bars in but, without the gain obviously this isnt possible unless its a different bit of code for the unlimited nudge gain .

Thanks for this, John. Exactly the same point was made to me verbally only a few days ago. The 'exchange for nudges' option ensures that you don't get a decent win and it doesn't offer it at all if the current win is too high. Ignoring the cherries is, I think, possible as the code stops looking for winning symbols once it finds a cherry. Telling it to stop looking appears fairly straightforward but you would then need to avoid the GAIN code which looks for an alternative when it finds a win. Obviously, it won't find one if the whole point is to ignore the lesser win. That is far more difficult. I'll take a look when I get some time. Please don't hold your breath 😊

Thank you, sir - I do agree, but I also wonder who would have risked a gamble of £50 or thereabouts forty years ago? 🤣

https://www.ebay.co.uk/itm/371532527747

Sorted thankyou both of you

Thanks, Sulzerned. Luckily, I was able to buy them from an online pinball shop.

Still very usable Mike. If you can get some decent hi res pics of a bottom glass for sag you could go down the perspex route which would be cheaper than glass printing.

Awesome looking layout, many thanks.

Many thanks

Excellent work Pete and thank you for making them available. Some of these bring back many happy memories of being a nipper on holiday in Newquay (Wales) in the arcade, especially the Brenco. Is it possible to download the MPU1 files to play in MFME as i have a fixation with these after resurrecting my Nippy Nudger. Again Thank you.

Hi all . Had to creare a new account as I couldn't get in with my old details , and I couldn't see any way to contact admin . Hopefully I'll get back in to my old account . Sammy

Thanks pete

Thank you

Many thanks 🙂

Many thanks for this @pete_w. Bullion Bars was the first clubber I played legally. I won £16 that night, paid out in 50p's Back in those days it was about 32p a pint, makes you think then your are throwing 10ps in it. Is there any chance of payout sounds? Cheers WF.

A Couple of Classic old Marian Electronics games, 1 is a Z80 based Video Machine and the other is a TMS9995 based standard fruity. Thanks to the MPU Mecca Members for the resources. Click to Play Coppa Lot Click to Play U-Boat Torpedo

Much appreciated, many thanks

I am looking to improve my Summit Coin emulation. I have everything i could find on this site. Ultimate Nudge is working the best of them so far I particularly need information on any Sound Boards used. Play Ultimate Nudge Play Nudge Accumulator Play Supershot (Dutch) Play Push Over (Video Fruit) These are in various states of emulation so if you can help with anything that would be awesome

Excellent stuff and, you're right. £50 was a huge amount of money 40 years ago but some would have been unable to resist the temptation! It's great to hear from another who is prepared to attack the codes on these wonderful machines. It always astonishes me that there are so few comments along the lines of 'I wrote the software for these back in the 1980s'. I suppose it was a long time ago, though 😜

A wee update on this the machine is all back working albeit it needs a new alphanumeric display,a thank you to everyone who commented on this post especially netdent and midibob who helped alot. Cheers Brian

Layout NCU.rar

Will do 👍👍

If at all possible could you dump the roms please.

Well done, it looks good, nicely repaired

Great work.again . Glad you managed to get hold of the 6v bulbs too.

Morning Nick, yes that would be the plan I think! It's finding someone with the machine and the time to be able to help! Fingers crossed someone sees this that can help 🤞🤞

Hi just got my first barcrest horizon machine (RAINBOW RICHES) and I have joined the site to gain experience in maintaining my new interest

The newly made small glass was fitted along with the missing button decals

It could be the motor on the main control timer is sticking, With machine switched on your can turn the end of the main control timer shaft by hand which might free it off OR, It could be the variator timer, specifically the variator's cam switch. First, when machine is in credit, two timer's should start clicking away on the main panel. One is the rotary hold/nudge selector with wires around it's board, the other is the variator timer with a red cam which operates a cam switch as it turns.. When you press the start button, the main control timer starts, the reel motor starts and the reel solenoids lift to allow the reels to spin, normally the main control timer would complete a full revolution without stopping but this would allow the reels to run in a sequence. To stop this happening the cam switch on the variator takes over the power to the main control timer motor and makes it stop and start as the cam on the variator turns. As this action also starts and stops the main control timer motor This 'Varies' the stopping time of the reels to prevent sequencing. Once the reels have all stopped in their 1,2,3 sequence, the control timer takes over from the variator and restores the circuit to it's own motor to finish the timers full revolution. Now if the cam on the variator fails either the switch collapses, any of the wires have become loose or disconnected even if the variator motor fails then there will be no circuit to the main control timer motor and as soon as it starts it freezes in the same position with the result your machine just sits with the reels spinning and won't do anything else. if you get stuck post pictures or better still a video of your machine.