Hi friends...
I got a mail from Johannes Thelen, Finland, - ennenmikrotietokoneita.blogspot.fi
who saved a Nixdorf 820 computer. He has the scanned manuals but needs of course more information to
rebuild the system.
I send him the link to this forum but like to begin with these post.
In his email he has questions about the ti ALU 2321 / 2322 we can see in some of the pictures.
<< This 820 is so strange little thing (as you will see from the pics if they work now) I would need schematics for sure if I
ever going to get this running again. It seems this one uses mixed set of TTL and transistors. Some kind of half-TTL
upgrade from Logatronic maybe. Also there is weird chip types, like TI SN2321N what I couldn't find in any data books. >>
