Add two 8-bit numbers in 8085

In this program, we are going to write an assembly language program to add two 8-bit numbers in the 8085 microprocessor with a program flow chart and explanation of the program.

Add two 8-bit numbers in 8085

Program Statement

Write an assembly language program of 8085 to add the two 8-bit numbers which are stored in the memory locations D000H and D001H. Store the result in memory location D002H.

Explanation of Program

  • We have two numbers at memory locations D000H and D001H. Let these numbers be 20H and 23H. We have to add these two numbers.
  • Using ADD instruction we will add the two numbers.
  • Store the result at memory location D002H.
    • e.g. D000H = 20H, D001H = 23H
    • Result D002G = 20H + 23H = 43H

Assembly Language Program

InstructionCommentOperation
LXI H, D000HSet HL as memory pointer at memory location D000H.H = D0H, L = 00H
MOV A, MLoad the first operand in the accumulatorA = 20H
INX HIncrement HL to point next memory location i.e. D001HH = D0H, L = 01H
D001 : 23H
ADD MAdd the second operand with the first operand.A = A + M
A = 20 + 23
A = 43 H
INX HIncrement HL to point to the next memory locationH = D0H, L = 02H
MOV M, AStore the resultD002H = 43H result
HLTTerminate program executionStop

Flow Chart of Program

add two 8-bit numbers in 8085
Sr. No.Name of the 8085 Programs
1.Write a program to load the data into the accumulator and any register.
2.Write a program to exchange the contents of memory locations.
3.Add two 8-bit numbers.
4.Subtract two 8-bit numbers.
5.Add two 16-bit numbers.
6.Subtract two 16-bit numbers
7.Find the 1’s complement of a Number
8.Find the 2’s complement of a Number
9.8085 Program To Mask The Lower Nibble
10.8085 Program To Mask The Upper Nibble
11.8085 program to pack the two unpacked BCD numbers
12.8085 program to Unpack the two packed BCD numbers
13.8085 program to find the sum of a series of 8-bit numbers
14.8085 Program to sort the numbers in ascending order
15.8085 Program to sort the numbers in Descending order

Hello friends, my name is Trupal Bhavsar, I am the Writer and Founder of this blog. I am Electronics Engineer(2014 pass out), Currently working as Junior Telecom Officer(B.S.N.L.) also I do Project Development, PCB designing and Teaching of Electronics Subjects.

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

telegram logo Join Our Telegram Group!