Physical layout of my TC12:
I have it on my lap, with the UNIBUS connector towards me.
There is a row of jumpers (None set) in the top left and right of the card,
right under the handles.
There are 4 DIP switches between the 2 ribbon cable plugs.
There are 2 10-switch DIP packs next to the 2 Emulex chips. SW2 and SW3.
There are a few other wire-wrapped jumpers scattered around the board.
Next, the 4 UNIBUS connectors are labeled C, D, E,
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