More than once, actually :-) It's a not-uncommon
fault, and I've fixed a
few Sorcerers.
I've written up the project thus far, for those who might be interested.
http://www.classic-computers.org.nz/blog/2011-06-25-sorcerer-rom-pac-fix-pa…
I'm just hoping that I can get this Willem to burn the 27C16s properly.
I've got to wait for my UV eraser to arrive though to try again.
Terry (Tez)