MIT CADR (Lisp machine) emulator and software

There is some plausible verilog code on that page and schematics. It looks like Brad got a core design running in simulation - no evidence of synthesis or IO (yet?).

Tempting - amongst 1e6 other things.

I find the lack of cursor keys will be disturbing to the uninitiated.

Last time I checked, it would be expensive, perhaps prohibitively, to build a small batch of them.