Thanks! Watching it now :)
PS: it's a good video, but focuses a bit too much on the political background ... which may of course be interesting as introduction for people without 'first hand' East German experience ;).
The video doesn't mention the most interesting unsolved mystery: how the Z80 was actually cloned. There are a couple of contradicting stories around (with the two extreme ends being (1) the Stasi stole the masks directly from Zilog or another Z80 vendor - which makes a good James Bond story, and (2) somebody just literally walked into a West German electronics store, bought a handful of Z80s, smuggled them back over the border, and the rest was reverse engineered via traditional decapping - which is a much more boring story, but also much more likely.
The only fact that helps to clear up some of the myths is that the East German Z80 is not a 1:1 clone of an original Zilog Z80 because it differs slightly in undocumented behaviour, but it could probably be 1:1 clone of a non-Zilog Z80 clone (such as Hitachi's).
