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You should be ok as most of the time these machines are switched off because they don't work

The most bullet proof tech ever. They had to add variaous I/O boards and they upgraded the game cards to deal with more complex sounds wtc but it worked well. Even though i don't have any MPU4 machines it has my vote as being the best for reliability.

Lovely machines, all of them. I think we don't have the £2 Adders and Ladders roms in the dat file. Also would be interested to know if HV has the original rom set in, which reset to square 4 after the attract mode finishes its cycle. You do have 4 of the 5 holy grail there mate.

MK 2 break much more when they blow up, see my thread on mk 2 ones https://www.fruitemu.co.uk/ib/index.php?/topic/20769-epoch-mk2-and-mk1-psu-repair/

bored, so started thinking about what I know, or think I know about MPU land. Heres me list: MPU TYPES: barcrest machine processor unit - MPU0 techincally, the very first controller- no ram/roms, lots of discrete DTL logic MPU1- first 6800 based unit, still running the earlier mechy reels. MPU1 second revision- diffrent flavour of the same computer- first revision in an ugly two sided case, second revision is one in your picture. MPU2 - early versions mechy reels, later versions steppers. But later programs use the lamp output for the reels, find a board cover you will see what I mean. Its also why lots of MPU2s burn out the reel drive transistors. They arent rated for it. MPU3- Even people who dont follow fruit machines know what mpu3 is- its really that famous/ notorious, a true electronic celebrity- its been around in 7 revisions, some official, some unofficial MOD0- 3 - early boards with small RAM MOD4 - prob no longer exists, had some modifications on the PCB that didnt work, so field engineers modded them back to mod3. MOD5- board revision with bigger RAM and sensitivity circuit added on the PCB. MOD6- adaption of the PCB to use small daughter card with 6116 RAM MOD7 -unnoficial update! uses ZRAM, zero power RAM , and has some other tweaks. A special revision by the meccas MDS- and also a secret, so no telling! MPU4 - 1983 to present day, co existed with MPU3 for a while in the early 80s as well. Is around in 3 versions, alougth officialy theres only 2- MOD2 - origional version (mod1 was factory develpment platform, never released) Has yamaha sound chip. MOD4- second revision (again MOD3 factory prototype and inhouse only) Sampled sound used on program card, socket left on PCB to fit sound chip if desired. MOD MECCA- well you could say that- this one is a board that we have fitted the sound chip back onto. Theres a few in circulation all over now ! MPU3 video- it did exist, but I dont know much about it. MPU4 video - a video computer that plugged into the standard MPU4 (MOD2 mpu4 btw) . Quite an impressive system! MPU5- the current standard for most arcade ops- seems more reliable than rival systems. JPM: jpm pioneered the stepper motor system at a trade show in 1978, so far, to date they have used: electromech reel processor - 1974 till about 1978- quite bellfruitish, 16 relays and 4 cam timers. And electromechanical reels, again similar to the BF unit. SRU - revisions 0-9 - all very similar, the changes to them were very suttle. JPMs first stepper motor system, quite revolutionary in its day, and all built into a handy integrated assembly that plugged into the machine. Used horrible valerco plugs tho that dont have good track record for longevity! SRU overseas revision- SRU board with diffrent layout. Program ROMs on a daughter card with a nicad and a static RAM. Seen in dutch JPM machines and others. Unlike the SRU board in the british machine, this board looks a bit like an early pinball machine processor- square board with plugs down either side. System 80 - SRU based platform with extended outputs, seperate CPU and sound cards and improved interconnects, again all in that handy integrated unit. Some very well known and well liked games on this platform. A good system from JPM and not as difficult to repair as first thought. For years when we had system80 repair threads it was thought that the CPU cards were murder to fix. Now some of them are, this being due to the freindly nicad, but lately paulgee discovered that 9 times out of 10, its nothing more than faulty RAM. He was lucky enough that I found some replacment 5114 for him, but if all else fails, you can use 2114 without a battery backup, or you can make a mod to use 6116. This system generates a lot of heat tho as all the 12v outputs are directly driven , no matrix on these! MPS1- still embracing the TMS family CPUs, but now with a lamp matrix and a number of other improvements. Good system but not a great deal of good games on it. David Powell designed this system, as well as epoch. Its the PSUs that are a minefeild on this tech. If you have an MPS1, and it has a red label PSU, change it for a yellow label. MPS2- MPS1 compressed onto a much smaller board. Lots of discrete logic replaced by 8255 PIAs, but JPM used custom made ones, so they arent marked 8255. MPS2 and MPS1 are backward compatible apart from 1 or 2 games, usuallly BWB ones. SYSTEM5- scary serial IO reel drive JPM system. Crap tech but brilliant games. 2 revisions, one had yamaha sound, one didnt. they arent interchangable. IMPACT- JPM impact is a very nearly perfect fruit machine MPU. All modular, but all contained on a motherboard with edge connectors rather than ribbon cables to off board units. This system is quite robust and has stood the test of time. Early impact machines were in ugly vogue cabinets, later ones in the electra. Impact has had 2 flavours over the years- impact 1, which is the 4 slot motherboard system, and impact 3, where all the expansion is carried out an a single card. Possibly they are compatible program wise, but I have never tested that theory out! HEBER PLUTO5/6 - when SEGA took them over, they started to use HEBER machine controllers. Dont know much about these at all apart from the fact that anyone who knows C programming could develop a heber machine- you can download the dev kit online!

A couple of my grail machines acquired today massive thanks to mike

I think bellfruit scorp tech is great,and barcrest super reliable aswell.maygay have good games but tech not so good.then again,fruities are made to last 4 years then be scrapped and replaced.And any tech would do this easily.so now we have the shit of keeping them running even though they should have been scrapped 25 years ago.

At BF there wasn't a specific time limit between techs. Most time it was down to component availability. Scorp 4 was the longest running tech while i was there.

I like Epoch it was 9 years I make it they were still bringing games out...Global used it long after maygay went. I like scorpion4 too and impact. I'm not keen on mpu5 but just because they're so common and usually stinking and battered lol

my mate uses this stuff https://www.ebay.co.uk/itm/Titebond-III-3-Ultimate-Wood-Glue-16oz-473ml-Bottle-RDGTools-wood-making-turning/291712558833?epid=2254451141&hash=item43eb6c66f1:g:6mIAAOSwMORW7Amt not used it myself but he says its the best

Think MPU4 lasted the longest at 13 years as a main tech But was still used into the early 2000s, and rebuilds. 1985 - 1998

Thankfully they still are.

The most unreliable shoddy tech ever to hit the market, fact!

When we had HV it would reset to square 4 however if you were a lot higher up the board it would also reset to 44 😉

Little bit of searching and I found these.... sidewinder too was another! Clone of Roller Coaster... Can’t seem to find an image though!

Ha,you wait for one and 4 turn up.... Just like buses lol. Gotta Love all the small cab Barcrest mpu3 family. I have 6 and a half of them here.... (The half is Exchanges Galore lol.) It's only half because it's only half the game of Exchanges Unlimited. You need instant replay,Line Up and Chances Unlimited for the entire family photograph. Wouldn't that be something. Fantastic find and congrats for getting these. It doesn't matter how much they cost. You having them makes you the winner in my book.

If I remember right Popeye was in a green vogue trimmed cabinet... I also remeber one called OXO if I remember right In a red vogue trimmed cabinet... both very similar games...