I'm really not surprised, but I feel that there's no reason it shouldn't work with some work...
there's also not much reason a rocket can't boot A/UX either TECHNICALLY, but it also won't boot.
I suspect that there's some core differences in the rocket rom as compared to the 900/950 rom that it pretends to be, but I haven't looked closely or bothered to think about it much... would be nice to know...