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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If SUBB A, R4 is executed, then actually what operation is being applied?
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R4+A
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R4-A
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A-R4
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R4+A
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Explanation:
Detailed explanation-1: -3. If SUBB A, R4 is executed, then actually what operation is being applied? Explanation: SUBB command subtracts with borrow the contents of an accumulator with that of the register or some immediate value. So A-R4 is being executed.
Detailed explanation-2: -SUBB command subtracts with borrow the contents of accumulator with that of the register or some immediate value.
Detailed explanation-3: -The flag bits of the PSW register are affected when arithmetic operations are executed in the 8051.
Detailed explanation-4: -The ANL instruction performs a bitwise logical AND operation between the specified byte or bit operands and stores the result in the destination operand.
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