Sorry for being off topic, but one of the posts here made me think of it.
Does os4.x for classic even support the custom chipset in a way that its possible to use custom chipset based software ? I know AGA is "supported", but in what manner ? Im under the impression its only usable as a basic gfx display (ie. akin to a weak gfx card)
OS4 does not support the custom chipset at all as the 68k chip is switched off. Whole OS run on the PPC.
You have to run classic games and hardware banging apps in EUAE the same as on MorphOS.
If you want to run classic games there is no point in running os4