Adding, and, or, xor numbers
By viewing the input and predict the output to see if it match with the display
4Nixie tube
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | bit1_XOR | display | display |
| 1 | bit2_OR | display | display |
| 2 | bit3_AND | display | display |
| 3 | bit4_ADD | display | display |
| 4 | numbersel_NOT | display | display |
| 5 | positionsel_dispB | display | display |
| 6 | signsel_dispA | display | power13 |
| 7 | modesel | display | power24 |