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8-bit adder subtractor

Ripple carry 8-bit adder subtractor

Inputs:
Side brown switch - Subtract control signal

Back light green OR gate - Carry in

Frontal blue OR gates
Top - (left)A0-A7(right)

Frontal light blue XOR gates
Bottom (light blue) - (left)B0-B7(right)


Outputs:
Back black OR gate - Carry out

Back red XOR gate - Sum - (left)S7-S0(right)

Back brown XOR gate - Overflow/Underflow