Question

Question: Design and implement a 4-bit serial adder/subtractor using shift registers (refer to lab 6). The circuit should be able to do both addition and subtraction with following requirement: 2. The circuit should have a control "addsub" signal, and 4-bit binary inputs "a" and "b" representing number from 0 - 15: a. When addsub = 0, circuit will do addition "a + b" b. When addsub = 1, circuit will do subtraction "a - b" 3. You can assume "a" is always larger than "b", so result is always positive 4. To get all credits, you need to load binary-coded decimal (not 2's compliment) into shift register directly. If you load 2's compliment into shift register, it's only considered partially correct even if the circuit works properly.

          Question:
Design and implement a 4-bit serial adder/subtractor using shift registers (refer to lab 6). The
circuit should be able to do both addition and subtraction with following requirement:
2. The circuit should have a control "addsub" signal, and 4-bit binary inputs "a" and "b"
representing number from 0 - 15:
a. When addsub = 0, circuit will do addition "a + b"
b. When addsub = 1, circuit will do subtraction "a - b"
3. You can assume "a" is always larger than "b", so result is always positive
4. To get all credits, you need to load binary-coded decimal (not 2's compliment) into shift
register directly. If you load 2's compliment into shift register, it's only considered
partially correct even if the circuit works properly.

Question:
Design and implement a 4-bit serial adder/subtractor using shift registers (refer to lab 6). The
circuit should be able to do both addition and subtraction with following requirement:
2. The circuit should have a control "addsub" signal, and 4-bit binary inputs "a" and "b"
representing number from 0 - 15:
a. When addsub = 0, circuit will do addition "a + b"
b. When addsub = 1, circuit will do subtraction "a - b"
3. You can assume "a" is always larger than "b", so result is always positive
4. To get all credits, you need to load binary-coded decimal (not 2's compliment) into shift
register directly. If you load 2's compliment into shift register, it's only considered
partially correct even if the circuit works properly.

Added by Leslie V.

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