I'm also curious about what processor it's built around, if you
don't mind checking.
Why does it have to have a processor at all? A number of the older
terminals, both 'glass TTYs' and those with some limited control code
response, like cursor positioning, were built from simple TTL (etc)
chips. Sometimes the artchitecture was something like a processor (DEC
VT5x, for example), sometimes it was just random logic.
-tony