申論題

[Problem 4] (20%) Given the 8-bits adder ( named Add8), the 2-to-1 8-bits multiplexers (named MUX8 _2to1) and the basic gates such as NOT, AND, OR, NAND, and NOR, you are asked to design an ALU in function block diagrams, which must match the following requirements:

(1) Support add, sub, and sgt (set on great than) functions. Their operation selection bits (op_sel) are as follows: add(00), sub(10), sgt(11),