
8-Bit ALU with state machine to read A and B inputs using the 8 digital pins. Operation control over the In/Out pins. Status out over the In/Out pins.
TODO: Test explanation.
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | in0 | ou0 | s0 |
| 1 | in1 | ou1 | s1 |
| 2 | in2 | ou2 | carry_borrow |
| 3 | in3 | ou3 | f0 |
| 4 | in4 | ou4 | f1 |
| 5 | in5 | ou5 | f2 |
| 6 | in6 | ou6 | f3 |
| 7 | in7 | ou7 | f4 |