Screen Corruption in RAD Menu

[Soopahfly]

Hi!
I'm having an issue with the RAD I built for myself.
When I'm in the menu screen, I get a whole load of screen corruption, as seen in the screenshot below. The characters are not static, they all fly across the screen.

This behaviour persists with both the Pi3A and a Zero2W.
So far, changing any of the values in the timing screen doesn't make any difference.

One thing to note, I do have sram inside the C64. I had faulty Micron ram.

I haven't tried it with any programs yet to see if the issues continue there. I don't get this issue with the Sidekick, the KFF2 or the Pi1541.

Any ideas?

[Soopahfly]

Noticed its doing this too.

[frntc]

This looks weird. To pin down the problem: are you using external power for the RPis?

[Soopahfly]

I managed to figure it out. I decide to ask AI to see what it thought, only because I'm no electronics whizz and I don't actually know what the IC's do. It pointed me to the 74LVC573. I sat with my dental pick and found that I had not soldered a couple of the address pins particularly well.
So a quick whizz with the iron and it now seems to be behaving itself.
Love the project, and can't wait to see what you do with it.