I am trying to find info on the BBN C/70, a 1970s minicomputer (roughly equivalent to a high-end PDP-11) which played a role in the early days of the ARPANET (predecessor or Internet)
The thing that intrigues me about this machine is that its word length was 20 bits. Since I am in the process of building a 20-bit wide homebrew TTL machine myself, I would be interested to know more about its BBN forebear.
Any manuals/pictures/articles (especially h/w related) would be most welcome.