melott's correct.
The complete ROM is split into one ROM chip with the odd and one with even address bytes in all 32 bit Amigas. If you accidentally exchange both ROM chips nothing bad will happen, except the system will not boot, since the ROM is completely garbled and doesn't make sense.
However, if you reverse the chips, i.e. orientate the notch to the wrong side of the socket, you will instantly fry the ROM chips and will have to get new ones.
Printed silks are wrong on some models, so do note orientation before you remove the old ROM chips - this must be the correct way to put them in if Amy was working.
