Draw the flowchart and explain arithmetic addition and subtraction algorithm with example?

Answer 1

The signs use an exclusive OR gate where if the output is 0, then the signs are the same.
Hence, add the magnitudes of the same signed numbers. If the sum is an overflow, then a carry is stored in E where E = 1 and transferred to the flip-flop AVF, add-overflow.
Otherwise, the signs are opposite and subtraction is initiated and stored in A.
No overflow can occur with subtraction so the AVF is cleared.
If E = 1, then A > B.
However, if A = 0, then A = B and the sign is made positive.
If E = 0, then A < B and sign for A is complemented.