Question

Construct a program using assembly language to perform the addition of two values - the first value; 4AH stored in register B and the second value; 36H stored in register D. The result of the addition is then stored in memory location 0x2020. Include comments to each instruction line of the program.

Answer 1

Program:

LDA B // load the content of register B i.e. 4AH to accumulator

MOV R1,A // move the data from accumulator to register R1

LDA D //load the content of register D i.e. 36H to accumulator

ADD R1 // add the data of register R1 and accumulator and result store in accumulator

STA 0x2020H // store the data at memory location 0x2020H which is stored in accumulator