This design should be able to recreate the old HP 5082-7500 display logic. This is a custom HP ASIC from the 70s, made on new silicon.
Connect inputs to 4-bit BCD input and LEDs to output x---y
BCD switch or counter LED dot-matrix-display.
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | |||
| 1 | |||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |