I seem to have caused a slight misunderstanding..

When I stated : "Its terrible to play the doubting Thomas"
I was actually referring to my own negativity and not to anything others had written.

I had noticed that Kai had taken a shortcut with the address bus layout (which would have been fine just for RAM), but as he had added a jumper for internal/external access , I presumed it was an oversight.Which we have all done before.
I also believe that it would have been better to use a modern variant.

I would like to apologise to those who may have felt offended by lack of clarity.