MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -The ADD instruction adds the value of Operand2 or imm12 to the value in Rn . The ADC instruction adds the values in Rn and Operand2, together with the carry flag. The SUB instruction subtracts the value of Operand2 or imm12 from the value in Rn .

Detailed explanation-2: -Arithmetic instructions of 8085 perform arithmetic operations such as addition, subtraction, increment, and decrement. Any 8-bit number or the contents of a register or the contents of a memory location can be added to the contents of the accumulator and the sum is stored in the accumulator.