Leaderboard

Next we have the dongles, as mentioned before they are rs232 so have the small 8 pin chips as level converters and the pic listens for the code supplied to it and answers with a different one, if this matches in the software game continues otherwise its 'contact maygay!' inside

And these are the other 2 program cards that I know of for M1 A FM sound card And finally what must be the very early type where the onboard sound Chanel is used (1989)

ok so there are the different ESP program cards, first the standard one next the 'high security' one which has to have dip 8 on the M1ab board on for it to boot up. this was introduced in some later machines to prevent hopper fraud as it monitors much more closely the hopper operations for fraud. special software used for these to work this is a close up of a duff security board add on still to be repaired

Not seen this happen myself, only if the keyway is missed and the wrong voltages can go up the wrong pins, but again it usually fails safe! remember Chris removing and inserting connections all around a M1ab board can twist and flex it and if there is a dodgy track that's when it is more likely to fail on the m1 ab boards

yes mate found new files burned them and she lives again happy days

Hi Chris, sorry to hear your having problems fella, my old Donkey Kong used to play up and was always related to the wiring loom between the Power Supply and the board. I would usually slightly sand paper the header pins and push the pins on the plugs back in with a dart tip of all things and this would always get it working for say another 4-5 months before the faults would start coming back ..repeat above process all good again. I finally bit the bullet and replaced the plug connector to the PSU and it ran perfectly thereon got be worth having a go at the above by the sounds of it you have nothing to lose 😞 cheers Stef

Next up is a download one get three free affair from the Lo-tech Astra area in the name of BIG Ten. The layouts are set on the original £10cash, £5 cash, £15 Cash and a £8 Token setting, The £8-£4 decals are a tad rough due to the only images found. Thanks goto Spa for the images used, Cashbox1 for allowing me to continue and release this and to DAD for the roms given to cashbox1, of which i got running for him originally and his reel symbols from partytime etc Big special thanks to Astraluke via dadsfme for the £10 decal and original reel symbols for these I think that's everything Enjoy and Happy Gaming!!! Astra's Big Ten £5-£8t-£15 Dx's.zip Astra's Big Ten £10 Dx.zip

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!

if you wont chris i will have a look for you mate not a problem

Yeah I removed the battery, and fixed the connector that comes from the psu. My boys are playing on it right now😉

Could a bad 12+ volt connector cause this problem to? I see that 2 red wires from the power supply to motherboard made bad contact. I am gonna replace them before going any further. The 12 volt red control light on the motherboard is not lighted properly. Also when i look at the 3 capacitors 16v 470uf (near the power supply connector) they look bad. And yep, battery has leaked a little bit, but no damage!

fiber pencil!! perfect!!! sandpaper leave the surface all rough and causes lack of contact too, fiber pencil doesn't

If you can make a routing plug like the picture below... this should work in your machine... This is providing nothing silly has been done with your mech when it was reprogrammed for new £1 Number on the picture represent coin channels (1, being £1 and 4, being 10p) The £1 has a double link to then make it divert to its own cash box! Hopefully it will work for you! 👍🏻

M1V! Any chance you could take a picture of the MPU for archive purposes.

I cleaned the connector from that board and It boots up.😁

Remember this one well, thankyou for all the work, yes before it all came crashing to an end.

I've attached it to this post, I'm sure no one will mind lol. oo3.1x.zip

At last, I've made a space for it next to the others!

I have some global stealth tech so i can add a little. It's usually found in the millennium mark 1&2 cabinets... I've seen dated from as late as 1999. (Looks more like 94 era) It's fairly reliable, much the same as configuration as JPM impact... battery damage on the game card eventually kills it, but it can take slightly more damage than an impact cpu card as the battery is better located. The tech is a comparable level to Scorpion 2. It was popular on Globals club machines which are fairly 'player unfriendly' low frequency jackpot machines. The version I have has a scorpion 4 type power supply that maybe an Diy replacement. In terms of timeline it seems Global switched to Epoch/elegance cab after this short Era.