Ah yes, I'm more worried about the actual limits of what the combination of Linux + the initramfs can let us do (Memory wise, mostly).

In theory it should be feasible but I'm not too sure how you'd "adapt" the way of doing things within Linux; the environment is very limited and I can't think of a way to cleanly make the Tom more "accessible" (While again, Tom is already executing the object lists to drive the Linux console). Doesn't help that it'd need additional afterthought not to trip it up with one of the many hardware erratas both Tom & Jerry had...