Microprocessor
HLT opcode means

  store result in memory.
  end of program.
  load data to accumulator.
  load accumulator with contents of register.

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Microprocessor
Assertion(A): The frequency of 8085 system is ½ of the crystal frequency. Reason(R): Microprocessor (8085) requires a two phase clock.

 A is false but R is true
 Both A & R are true but R is not the correct explanation of A
 Both A & R are true and R is the correct explanation of A
 A is true but R is false

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