901 Gate Guesser
901 : Gate Guesser
- Author: Fabio Ramirez Stern
- Description: A very simple gate guessing game - which I/O is connected to what?
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
How it works
The input and inout (used as inputs) pins are connected to 8 different logic gates, which lead to the outputs. Only one logic layer of combinatoric logic. Each input is hooked up to only one gate.
How to test
No clock, enable or reset is used. As this is just one layer of combinatoric logic, you can simply check against a precalculated truth table. To play, flip the inputs and observe the output until you recognise what it must be.
External hardware
Connect 16 switches to the input and inout pins, the 8 outputs are hooked up to one LED each (or other display hardware of your choice).
The solution is (SPOILER):
- out0 = in0 and in2
- out1 = not in1
- out2 = in5 and in7 and inA
- out3 = in6 xor inC
- out4 = in4 nand in9
- out5 = in8 xnor B
- out6 = inE nor inF
- out7 = in3 or inD
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | switch0 | gatey0 | switch8 |
| 1 | switch1 | gatey1 | switch9 |
| 2 | switch2 | gatey2 | switchA |
| 3 | switch3 | gatey3 | switchB |
| 4 | switch4 | gatey4 | switchC |
| 5 | switch5 | gatey5 | switchD |
| 6 | switch6 | gatey6 | switchE |
| 7 | switch7 | gatey7 | switchF |