exxos's Atari, Amiga & retro forum

mrbombermillzy wrote: 13 Sep 2025 17:33 It all turned out good in the end then. :D

Seems to have, yes :)

Good news !

HigashiJun wrote: 14 Sep 2025 01:25 Good news !

Indeed it is.

Yay!

Well, my OSI is the gift that keeps on giving...

I had it out last week to check it before Cyber Legends 4.

It was all good, ran like a champ, worked fine from the Gotek.

As soon as I set it up when i arrived, I'm just getting a screen full of random characters...

No amount of tinkering brought it back to life.

It'll be back on the bench this week, bloody annoying.

At least I know some stuff is working, I have a good character ROM, good screen RAM and likely the main RAM is fine. My money is on the monitor ROM again.

:dizzy:

:o

HigashiJun wrote: 12 Oct 2025 13:31:o

Yeah, that's about the top and bottom of it.

Not had much time to do anything with it today. I swapped RAM about, no different, swapped CPU, no different, gave the SYN ROM socket and CPU socket a spray with contact cleaner, no different and it does the same with the CPU removed, so looking like no code is running. Same with the SYN ROM removed.

Not much time to look today and will be busy this week as on holiday next week.


:dizzy:

It's quite annoying to have a working machine suddenly having issues.

Just hope you'll fix it up quickly.

HigashiJun wrote: 13 Oct 2025 08:13 It's quite annoying to have a working machine suddenly having issues.

Just hope you'll fix it up quickly.

Thanks, though I think I may park it and look at it when I'm less annoyed!!!

It's much like before, I just don't think the ROM code is getting to the CPU so nothing gets initialised. Could be something I haven't looked at yet as there are multiplexers in the mix that could be bad.

rubber_jonnie wrote: 13 Oct 2025 09:10 Thanks, though I think I may park it and look at it when I'm less annoyed!!!

Yeah, better to cool down before attempting something...