Logical instructions in 8085 microprocessor
Logical instructions are the instructions that perform basic logical operations such as AND, OR, etc. In the 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 complement 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
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