Design a simple ALU that consist of 8 operations. x, y, and z are the input of ALU as in Figure 4, and the operation are based on Table 1. A and B are 8-bit unsigned input and S are 8bit output. Develop a waveform to show that your design is correct by adding all the possibilities.

To download to FPGA. Since FPGA have limited switch, fixed one of your input and varies another one. Display your output to seven segment display.

Inputs			Operation
x	y	z
0	0	0	A + B
0	0	1	A - B
0	1	0	A/8
0	1	1	NOT A
1	0	0	A NAND B
1	0	1	A NOR B
1	1	0	A XOR B
1	1	1	B-1

B a7 b7 a6 b6 ao bo AL-extender AL-extender IA IB abext abext abext cinext Adder cin IS ia7 ib7 ia6 ib6 ial ibo cin ALU (b) S (a)