We actually have schematics here.

I'd appreciate hints, though (see previous post) smile

There is also a 'new' piece of DEC hardware i encountered during my search, the so-called Mini-Exchange. It was a serial 8 port serial X switch with DOS support (Xattach, XDetach). Sort of an early Laplink.

Thanks to all uploaders (wink Rfka).

Last edited by Bavarese; 09/20/16 09:31 AM.