Jump to content


Photo
- - - - -

MPU Mecca - Replica JPM System 80 CPU cards


  • Please log in to reply
No replies to this topic

#1 MPU Mecca

MPU Mecca

    Senior Member

  • Regulars
  • 10806 posts

Posted 20 May 2018 - 09:16 PM

Well as some of you know back in 2015 I designed replica sys80 cpu pcb's and had a few produced into PCB's to test, well the testing never happened despite just being able to plug it into a just arrived non working machine that had had nothing done to it, not even the psu was checked! needless to say it didn't work and I never saw a sys80 machine again! that was back in 2015!

 

So have had this made up card since then really untested!, A 'Tumble' sys80 was promised to test it in but never even saw that machine!! With my posts fairly recently I had several PM's wanting to buy the sys80 replica cards! but as they untested I couldn't! so I tagged a tounge in cheek comment of 'now all you have to do rich is find me a sys80'! on a thread when he found someone a machine they wanted!!

 

well Rich did good!!!! he managed to find me a Sys80 barn find!! He also sorted out the delivery as where it was I had no clue where to even start to get it here!! It arrived Friday!

 

so over the weekend went through it, the cpu card was knackered and the psu had several issues! I finished fixing the psu earlier and am happy with all voltage rails!

 

next I decided to try my replica cpu card in it, the 2 red lights on the I/O went out and the reels spun!!!! could not believe it!! been waiting 3 years to test this card!!!

 

vid.....

 

 

machine appears to be stuck in lamp test mode! that was down to someone removing the front keyswitch! so now I can get attract AND shutting the door realplay too!! no sound at present but well chuffed the replica cpu cards work!!!!


View the full article




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users