ThoR’s mmu and cpu libs serve no purpose with PiStorm, so probably not.
At least one obvious and important detail is missing - Emu68 or Musashi?
I kinda doubt it’s actually related to OS 3.2.2.1 as topic suggests, but … have older OS releases been tried?
(I kinda suspect self-modifying code in mpega.library) Btw, doesn’t Raspberry Pi have hardware for accelerated mpeg (and h264 and others) and if so, wouldn’t a dedicated mpega.library make sense?