Question

1. Assuming that the ALU has a 6-bit control word, how many different operations can it perform? 2. Consider the ALU shown on slide 9 of Lecture 16. Calculate the result for each operation specified in Table 1. Assume that A 1101 and B 0111. Specify the operation performed, the resut, and the value of each status bit 3 Write the VHDL code to describe an ALU that performs four operations: AND, OR, NOT, and Addition. Use a with-select-when statement. Use A and B for the data inputs, Cntl for the control input, and Result for the output. Write the VHDL statement for the ALU output. Do not write the statements for the status bits. ECE 332 DIGITAL SYSTEM DESIGN LAB LAB 8 Number of operations: Control tieZNC 10101 10100 01110 01101 Table 1: ALU Operations and Results

Answer 1