I uploaded another video filmed at 60fps where the effect it has is better appreciated. Note the colored lines that are produced.
It seems that something is not synchronizing correctly. But only in the logo!
I tried on another monitor and it does the same thing. I am puzzled...
I tried defusr=0:a=usr(a) in basic and it also does the same...
What happens if you run normal software?
Maybe the nonstandard ROM you use does introduce this somehow. It was made by NYRIKKI I believe. Maybe he has some insights?
@Manuel: Normal software works fine!
@sdsnatcher73: Yes, this was maken by NYRIKKII, but only me has problems...
I tried defusr=0:a=usr(a) in PAL mode (pressing H key in boot), then I get new colors . I show this in the below image: