> here is the answer from Prober about using 2 GB in Pegasos:
> 1. The stability went down a lot,
> 2. There were random crashes while using the system for a long time.

Thanks for probing (pun intended) into this issue.

> I haven't noticed this with MorphOS so maybe it's just an OS4 bug.

Either this, or it's a hardware/firmware bug that's just masked by the way MorphOS does memory accesses, compared to OS4. I once tried 2 GiB in my old Pegasos I that seemingly MorphOS worked fine with (and no errors with 'memtest extensive'), but Linux wouldn't even boot.

> Prober hasn't his Pegasos anymore […] so he can't check it anymore.

This leaves us with Fogg_80 and his 2B1 board with 2 GiB RAM, unless he no longer has it either.