Question

4 BIT ALU due 4/24 Midnight Implement a 4 bit ALU as covered in class. INPUTS: A – 4 bit 2’s complement number B – 4 bit 2’s complement number Control – determines ALU functionality OUTPUT: If control = 00, then output = A AND B If control = 01, then output = A OR B If control = 10, then output = A ADD B If control = 11, then output = A SUBTRACT B REQUIREMENTS: 1) You are only allowed to use Logisim’s AND, OR, NOT and XOR gates. However, you may use these gates to build more advanced circuits, like adders and multiplexers. 2) You are NOT allowed to use Logism’s built in circuits (i.e. adders and multiplexers) however, you are allowed to create your own. 3) The 4 bit ALU is to be built using subcircuits as shown in class. You are to build the 4 bit ALU using the following component subcircuits: a) Full Adder b) 2 line Multiplexer c) 4 line Multiplexer d) 1 bit ALU 4) When complete, zip your CIRC file using the following convention: CS240_Lastname_Firstname.zip and upload it to blackboard.