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Question

The following sequence of instructions are executed by an 8085 microprocessor
1000 LXISP 27 FF
1000 CALL 1066
1006 POPH
the contents of the stack pointer (SP) and the HL register pair on completion of execution of these Instructions are _______________.

A
SP=27 FP, HL=1003
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B
SP=27 FD, HL=1003
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C
SP=27 FF, HL=1006
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D
SP=27 FD, HL=1006
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Solution

The correct option is D SP=27 FD, HL=1006

Sequence of instructions are executed by an 8085 microprocessor
1000 LXISP 27 FF
1000 CALL 1066
1006 POPH
the contents of the stack pointer (SP) and the HL register pair on completion of execution of these Instructions are SP=27 FD, HL=1006.


The instruction cycle is the basic operational process of a computer system. It is the process by which a computer retrieves a program instruction from its memory, determines what actions the instruction describes, and then carries out those actions.

A microprocessor is a multipurpose, programmable, clock-driven, register-based electronic device that reads binary instructions from a storage device called memory, accepts binary data as input and processes data according to those instructions and provide results as output.


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