Just a placeholder for now. Eventually I'll add more information about what I'm up to.
Here are the circuit boards behind the front panel (need five of these) and the schematic. Here is also a 3D image of the board.
Or, for another possibility for a console, have a look at this:
Here's a start at a Processor Reference Manual.
The datapaths for the processor. It's currently running (in a Verilog simulator) and passing diagnostics for all of the user-mode instructions except for floating-point. The code is up on GitHub.