Hi everybody. I have just written up construction notes on this 80286 CPU board.
Please see here:- for details:-
Unfortunately there are some strange issues with the board running with RAM boards other than our 4MG Static RAM board
With that RAM board, the 80286 is rock solid at 11MHz (no I/O or ROM wait states required).
Please see the bottom of the page for details.
I am traveling all of next week but will explore further when I get back.
Sorry about the bad news