Logical instructions in 8085 microprocessor

Logical instructions are the instructions which perform basic logical operations such as AND, OR, etc. In 8085 microprocessor, the destination operand is always the accumulator. Here logical operation works on a bitwise level.

Following is the table showing the list of logical instructions:

OPCODE	OPERAND	DESTINATION	EXAMPLE
ANA	R	A = A AND R	ANA B
ANA	M	A = A AND Mc	ANA 2050
ANI	8-bit data	A = A AND 8-bit data	ANI 50
ORA	R	A = A OR R	ORA B
ORA	M	A = A OR Mc	ORA 2050
ORI	8-bit data	A = A OR 8-bit data	ORI 50
XRA	R	A = A XOR R	XRA B
XRA	M	A = A XOR Mc	XRA 2050
XRI	8-bit data	A = A XOR 8-bit data	XRI 50
CMA	none	A = 1’s compliment of A	CMA
CMP	R	Compares R with A and triggers the flag register	CMP B
CMP	M	Compares Mc with A and triggers the flag register	CMP 2050
CPI	8-bit data	Compares 8-bit data with A and triggers the flag register	CPI 50
RRC	none	Rotate accumulator right without carry	RRC
RLC	none	Rotate accumulator left without carry	RLC
RAR	none	Rotate accumulator right with carry	RAR
RAL	none	Rotate accumulator left with carry	RAR
CMC	none	Compliments the carry flag	CMC
STC	none	Sets the carry flag	STC

In the table,
R stands for register
M stands for memory
Mc stands for memory contents

Read related post: Arithmetic instructions in 8085 microprocessor

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