That 1D is historic, it's what STSS, the PDP-1 timesharing system was implemented on in 3 phases, Odin, Thor, and Zeus. The implementation seems to be well-documented. Well, you know where this is going to end up. I originally thought implementing the MIT timesharing from the -1X would be fun, but documentation is virtually nonexistent and the -1X was a huge hackfest. Then, maybe the BBN one, but it apparently never worked well and is also missing some key documentation. STSS, on the other hand, worked. The major bit that I''ll have to replicate is the custom Philco 12 terminal hardware, but my internal pidp-1 display rewrite will support that many displays easily, the drum exists, etc. My project list just keeps getting longer.
Bill