Kaneko ‘MC-1091/MC-8282’ reproduction by Caius

    • Kaneko ‘MC-1091/MC-8282’ reproduction by Caius

      THIS IS A REPRODUCTION PROJECT MADE BY @caius ALL INFORMATION HAS BEEN POSTED WITH HIS PERMISION. CREDIT AND MERIT GOES TO HIM.

      This is another little reproduction project that arose during my repairs.
      Some time ago I came across an Heavy Unit PCB which played fine except for the inputs that were not working.This had an explanation:

      This SIL custom (in ZIP46 package) marked ‘MC-8282’ was broken in half.Like the silkscreening tells, this custom handles all the inputs.I looked into my spares and found some Kaneko boards that used a similar custom with same number of pins but marked ‘MC-1091’ instead :

      I tried it in my board and all inputs were working again so I came to the conlcusion that the ‘MC-8282’ and the ‘MC-1091’ are essentially the same.Not happy enough, I decided to try to reproduce it.As always in this case, I first ‘stripped off’ the component by removing its coating and did some hi-res scans:

      As you can see from above picture, the designers pratically embedded in a single component a typical inputs circuit that can be found on many arcade boards.Techinically we can think of this custom like a big multiplexer made of four 74SL253 TTLs which receive on their inputs the signals from JAMMA edge connector.Obviously there is a common output enable signal and two selection ones as well.All other parts are printed film resistors (the black squares, the tiny ones are for pull-up), ceramic capacitors (for by-pass and signal filtering) and a couple of SOT-23 parts which I was able to identify as dual common cathode diodes :

      I fired up my multimeter in continuity check and in some time figured out the design so I made some rough prototyping on a breadboard:

      I had success so I start to draw schematics.I intentionally omitted some not vital parts (like the many ceramic capacitors) and used SMD resistors arrays, this allowed me to save room on PCB layout and keep the same dimensions as the original part.I sent the design to manufacturer and received the bare PCBs after some weeks:

      I assembled a unit:

      and installed it on PCB:

      Testing was successful, all the inputs of both players (plus SERVICE ) were correctly mapped and working:



      For reference the MC-1091/MC-8282 custom can be found on these Kaneko/Taito/Toaplan PCBs (list can be incomplete so other additions are welcome)

      The Berlin Wall
      Magical Crystals
      Bakuretsu Breaker
      Blaze On
      Shogun Warriors
      B.Rap Boys
      Great 1000 Miles Rally
      Bonk’s Adventure
      Blood Warrior
      Jackie Chan
      DJ Boy
      Gals Panic 1, 2, 3
      Air Buster
      Snow Bros
      Heavy Unit

      See you all to my next reproduction project!
      * Arcade-projects, the site where you get the most of your arcade games.
      * If you want Drama go to Neo-Geo forum ---Darksoft
    • Nice, I have a couple kaneko motherboards... @caius are you selling these? Would be nice to have just in case
      have multi: cps2 cps3 ttx2 naomi(netboot) st-v gnet f3 mvs(soon!)
      want multi: cps1 pgm 246/256 system16/32 naomi(cart) m92 atomiswave
      klov games list | custom fight sticks
      current project(s): cab-less ttx3 |tmnt2 audio fix | mwalk 6116 ram replacement | tekken tag fix???
    • caius wrote:

      ekorz wrote:


      • Nice, I have a couple kaneko motherboards... @caius are you selling these? Would be nice to have just in case

      I could.I have all the PCBs left (around 10) from this first batch.Do you need the blanks, kits or an assembled units?
      P.S.
      Is this custom really mounted also on Kaneko motherboard?Which hardware platform?

      I've got oedo fight (Blood Warrior) and great 1k rally as a backup motherboard, they're the same base motherboard and have the custom. I'd buy whatever is easy, I don't mind buying parts or building it if you have a kit.
      have multi: cps2 cps3 ttx2 naomi(netboot) st-v gnet f3 mvs(soon!)
      want multi: cps1 pgm 246/256 system16/32 naomi(cart) m92 atomiswave
      klov games list | custom fight sticks
      current project(s): cab-less ttx3 |tmnt2 audio fix | mwalk 6116 ram replacement | tekken tag fix???
    • ekorz wrote:

      I've got oedo fight (Blood Warrior) and great 1k rally as a backup motherboard, they're the same base motherboard and have the custom. I'd buy whatever is easy, I don't mind buying parts or building it if you have a kit.
      OK, I'll let you know when I have a kit ready for you.Parts are few. specifically:

      -four 74LS253 in SOIC16 package
      -four 100nF ceramic by-pass capacitors in '0805' package
      -four SMD resistor arrays (bussed/convex type), any value from 1K to 10K is fine mouser.it/ProductDetail/Bourns…252bGQjSG4I8%2FJRNA%3D%3D
      -2x23 rounded-machined male headers with 2.54mm of pitch (the female ones must be installed on the arcade PCB)
      -two dual diodes common cathode in SOT-23 package like the BAT54C (optional, you can also omit them) vishay.com/docs/85508/bat54.pdf

      The post was edited 2 times, last by caius ().