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What is the meaning of the given command in computer architecture?

CLA 7800

  • A.Clear AC
  • B.Clear E
  • C.Complement AC
  • D.Complement E

Answer: A

CLA is a register reference instruction of the basic computer with the hexadecimal code 7800. It clears the accumulator, setting all its bits to zero. The instruction to clear the carry bit E is CLE, with code 7400, and the complement instructions are CMA (7200) for the accumulator and CME (7100) for the carry. The answer is Clear AC, option A.

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