We will use the 74181 ALU hds model located in the Hades menu (Help> demos 74181

Question

We will use the 74181 ALU hds model located in the Hades menu (Help> demos 74181 ALU") to perform a sequence of operations (image shown below) First operation, configure the ALU to perform the addition of the binary values A- (0011)2 and B (0010)2 Let the result of A plus B C. Enter the value of C from the ALU binary format below in the response window eg a string of 1s and Os (MSB on the left down to LSB on the right) Be sure to use no spaces between the 1s and Os of your response as the auto grader is using a pattern match and spaces will cause it to score you input as incorrect. S3.S0 (function) CN+4/ ST B3, A3 F3 F2 B2, A2 A-B B1,A1 F1 FO BO, A0

Explanation / Answer

First response is F3

And second is A=B

To solve the above problems look into the logic table and arithmetic expression for each of the inputs and solve as per the circuit given. Dont consider spaces between 0 and 1 as it may make your answer wrong.

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