I've just received notice of a system.... "have you heard of a Tandata Td-1600? It was one of those Telecom computers I believe. It has a Z1 chip in it (whatever that may be) which I know is not a Z-80 but may be of interest to you just the same. It has a PS and all the right lights seem to be working. RF and RGB monitor outputs." I have no idea what this thing is. Have any of the readers of this list any more information? Cheers A