Question

Match the following: 1) SWAP CONTENT OF REGISTERS 2) DIVIDE by 2 3) PARITY CHECK 4) TWO's COMPMENT 5) ONE'S COMPLEMENT A) NOT B) XOR C) NEG D) SHR E) XCHG a) 1-E 2-D 3-B 4-C 5-A b) I-A 2-C 3-B 4-D 5-E c) l-B 2-A 3-E 4-C 5-D d) I-E 2-A 3-C 4-B 5-ID

Answer 1

The correctly paired answer is : (Option a) 1-E 2-D 3-B 4-C 5-A

Matched pairs:

      Part A                                  Part B

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1. Swap Content                                 e. XCHG

2. Divide by                                        d. SHR

3. Parity Check                                   b. XOR

4. Two's Complement                        c. NEG

5. One's Complement                        a. NOT

Explanation:

• To swap the contents of 8086 microprocessor's register, XCHG (eXCHanGe) mnemonic is used.

• To perform unsigned division, Shift Logical Right (SHR) instructions are used, by shifting the bits to the right

• By using the XOR gates, the parity check is designed. We can calculate the parity number of two numbers by keep on XOR the bits of the two numbers till only one number is left.

• Performing the NOT operation on the bits of a given number gives it's One's Complement.

• The MSB sign of a positive integer in two's complement is Negative.

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