Doesn't the AmigaOS license explicitly prohibit even clean reverse engineering?
It doesn't matter what M$ lawyers says, a contract enacted when you open the box where the install media of an operative system is packaged is not a binding contract.
Also, I rememeber the #$%& DMCA has a clause that allows reverse engeniering of hardware that is no longer produced and guess what, it has been more than a decade since an amiga with a kickstart rom was last manufactured.