Backing up, this is "Ole #1" as Wally Daniels calls it-- my first effort at making a computer, in 1985. The 6" LMB cube box held several Radio Shack 4.5" square boards with 44-contact edge connectors, and here you can see the "backplane". In spite of the incredible amount of time I put into it and the fact that it did work, this computer wasn't much good for anything. In the experience I did however learn what would be useful. Future efforts made much better use of space too. Bench-1 has a lot more of everything, all on a single board.

Here's the other side of "Ole #1". The board at the top handled the 8-character 7-segment (plus decimal points) LED display and the remote keypad of 16 buttons and four toggle switches. The 3/4" square by 6" piece of wood has slots to brace the boards.