Gates: truth tables
Unsigned Function
Binary 0 1 2 3 Name Gates
Inputs a 0 0 1 1
b 0 1 0 1  
Outputs 0   0 0 0 0 Zero
1   0 0 0 1 AND
2   0 0 1 0 a > b fix
3   0 0 1 1 a
4   0 1 0 0 a < b
5   0 1 0 1 b
6   0 1 1 0 XOR
7   0 1 1 1 OR
8   1 0 0 0 NOR
9   1 0 0 1 XNOR
10   1 0 1 0 ~b
11   1 0 1 1 a >= b
12   1 1 0 0 ~a
13   1 1 0 1 a <= b
14   1 1 1 0 NAND
15   1 1 1 1 One