61. The memory address of last location of an 8 KB memory chip is FFFFH. Find the starting address—

1. 1. FOOOH

   
   
   

   2. EOO1 H

   
   
   

   3. EOOO H

   
   
   

   4. FOO1 H

   
   
   

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1. View Hint View Answer Discuss in Forum

   EOOO H

   Correct Option: C

   EOOO H

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62. If the 8085 MPU adds 87H and 79H, what will be the contents of the accumulator?

1. 1. OOH

   
   
   

   2. 99 H

   
   
   

   3. 100 H

   
   
   

   4. 01 H

   
   
   

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1. View Hint View Answer Discuss in Forum

   OOH 87 + 79 = 100 H
   ⇒ Accumulator will have OOH

   Correct Option: A

   OOH 87 + 79 = 100 H
   ⇒ Accumulator will have OOH

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63. In the peripheral mapped I/O, can an I/O port and an O/P port have the same port address?

1. 1. Yes

   
   
   

   2. Data insufficient

   
   
   

   3. No

   
   
   

   4. Depends on the peripheral

   
   
   

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1. View Hint View Answer Discuss in Forum

   Yes
   ∵ I/P & O/P ports are differentiated by control signals.
   

   Correct Option: A

   Yes
   ∵ I/P & O/P ports are differentiated by control signals.

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64. In an O/P and I/P port can have the same 8-bit address and data. How does the 8085 differentiate between the ports?

1. 1. Control signals

   
   
   

   2. Peripheral signals

   
   
   

   3. Address bus

   
   
   

   4. Data flow

   
   
   

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1. View Hint View Answer Discuss in Forum

   Control signals

   Correct Option: A

   Control signals

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65. How many address lines are necessary to address 2MB of memory?
    

1. 1. 21

   
   
   

   2. 20

   
   
   

   3. 22

   
   
   

   4. 10

   
   
   

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1. View Hint View Answer Discuss in Forum

   21

   Correct Option: A

   21

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