8051 INSTRUCTION SET ADDRESSING MODES
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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MOV A, #56H MOV R1, #50H MOV 50H, # 45H XCHD A, @R1 What is the result at A, R1?
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56H, 45H
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45H, 50H
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50H, 56H
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45H, 56H
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Explanation:
Detailed explanation-1: -In assembly language, instruction MOV A B. means moving the content of B (source) to A (destination).
Detailed explanation-2: -In 8085 Instruction set, MOV r, M is an instruction where the 8-bit data content of the memory location as pointed by HL register pair will be moved to the register r. Thus this is an instruction to load register r with the 8-bit value from a specified memory location whose 16-bit address is in HL register pair.
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