76. Every processor must necessarily have
    

1. 1. data bus

   
   
   

   2. data bus and address bus

   
   
   

   3. control bus

   
   
   

   4. data bus, a control bus and an address bus

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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77. Which of the following flag conditions are not available in 8085 processor?

1. 1. Zero flag

   
   
   

   2. Parity flag

   
   
   

   3. Overflow flag

   
   
   

   4. Auxiliary carry flag

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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78. READY signal in 8085 is useful when the CPU communicates with
    

1. 1. a slow peripheral device

   
   
   

   2. a fast peripheral device

   
   
   

   3. a DMA controller chip

   
   
   

   4. a PPI chip

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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79. A DAD H instruction is same as

1. 1. shifting each bit one position to the left

   
   
   

   2. shifting each bit one position to the right

   
   
   

   3. shifting each bit one position to the left with a zero inserted in 1st position

   
   
   

   4. shifting each bit one position to the right with a zero inserted in 1st position

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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80. PSW stands for
    

1. 1. accumulator contents

   
   
   

   2. flag byte

   
   
   

   3. accumulator and the flag byte

   
   
   

   4. accumulator and temporary register byte

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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