If I was to make a modification to an 8 bit full adder to make it a an eight bit full subtractor would I put an inverter at the carry in input for the first full adder and then an inverter on one of each of the two inputs going in to each adder. eg an inverter on A3, A2, A1, A0 and leave B3, B2, B1, B0 alone? (Where 0=add, 1=subtract).(adsbygoogle = window.adsbygoogle || []).push({});

Thanks for your help.

Matt

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# Full Adder modified to make Full Subtractor

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