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Digital Electro...

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  • Question 1
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    After an arithmetic operation, the flag register of 8085 μP has the following contents.

    D7

    D6

    D5

    D4

    D3

    D2

    D1

    D0

    1

    0

    X

    1

    X

    0

    X

    1

     

    The contents of accumulator after operation maybe 

  • Question 2
    1 / -0

    To address the memory, 11 bits are used. Then what is the address of the last memory location.

  • Question 3
    1 / -0

    Consider the following representation of codes.

    (R) means the content of register R

    ((R)) means the content of the memory location pointed to be R.

    PC means Program Counter

    SP means Stack Pointer

    When a CALL Addr instruction is executed, which of the following sequential operations is carried out by the CPU internally:

  • Question 4
    1 / -0

    Consider the following set of instructions

    MVI

    A, BYTE1

    RLC

     

    MOV

    B, A

    RLC

     

    RLC

     

    ADD

    B

     

    If BYTE1 = 7H, then the content of A, after the execution of the program will be 

  • Question 5
    1 / -0

    A number 96 is stored at location 2501 and the following instructions are added

    LDA   2501 H

    CMA

    ADI 01 H

    STA   2502 H

    HLT

    The number stored at location 2502 H is

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