Leaderboard

I released this over at DIF a few weeks back..... Special thanks to Riche100 for the hi res pics resources... I do plan on fixing a couple of minor bits, token mech isn't correct but not going to get chance to take a look for a while. CROWNJESTERDX.zip

I thought it was about time to cut my teeth on Sys80. Quite an interesting tech which I need to get my head round. All in good time. First a couple of 8K CPU boards that had work done previously due to battery vapours. The first one would fire up but only if the board was flexed near the RAM area. It didn't seem to matter how much or little it was flexed as it didn't always start. As luck would have it I noticed a tiny nick in a track just under the negative battery terminal. You couldn't really see it with the naked eye, certainly not with my eyesight! Holding the board up to the light made it a bit easier to see. Once patched out it started everytime. The next one was purely a visual check as I've not powered it up for testing yet. Look at the track next to the green patch wire! After a clean up, a bit of careful adjustment, resoldering and a bit of green mask we end up with this... Another issue I've come across which I'm sure the Sys80 boys are aware of is there are two types of 8K CPU cards. I was looking at doing a RAM adaptor for testing being as I don't hold any 5514 RAM chips. This is the Heath Robinson version ... This was all very well until I tried to plug it in to the second CPU board and noticed the RAM sockets were further apart, by another pin space! Any thoughts of making a proper PCB means there would have to be two types. I'm sure others must have hit this one before. Another thing I've noticed was the PSU connector. Quite a few of the Molex crimps connectors had lost their tension and weren't mating too well. I'm sure this is well known by the Sys80 sage's but once retensioned made a noticable difference to the supply voltages. So it's all good fun for the moment and reading other folks repair reports there's going to be a lot of horror stories to come. Wish me luck.

A couple of machines that use the Mazooma card flip reel. These may be a bit new for here, but without the resources from here, in particularly the manual for Wet n Wild, they wouldn't have been possible. I have proper release thread over at Fruit-Emu and Desertislandfruits if you want to see more details. Just be sure to install any missing fonts to make sure they show correctly. A big thanks to Mecca Members - jonwarby and notallbad1 Wet N Wild.zip Stir Crazy.zip

Thanks for those, will give them a bash after the ryder cup.

You are never going to be able to copy or clone it. I also seriously doubt a pic chip could be used without being on a daughter board and having the software written to emulate the original which would be quite a task in itself. This page suggests that a replacement was built but it's lacking any details: https://www.fullcircuit.com/content/tms9902-replacement

Thank you.

Many thanks...

here you go its here hopefully mecca wont compress it too much

Set the door switches to 22 and 14, and Refill to 23