Free Electronic Circuits & 8085 projects

Electronic projects with circuit diagram and 8085 microprocessor projects.

Calculate the sum of series of odd numbers

Published on Nov 17 2009 // Beginners

Statement: Calculate the sum of series of odd numbers from the list of numbers. The length of the list is in memory location 2200H and the series itself begins from memory location 2201H. Assume the sum to be 16-bit. Store the sum at memory locations 2300H and 2301H.

Sample problem 1:

2200H = 4H

2201H= 9AH

2202H= 52H

2203H= 89H

2204H= 3FH

Result = 89H + 3FH = C8H

2300H= H Lower byte

2301H = H Higher byte

Source program :

  • LDA 2200H
  • MOV C, A : Initialize counter
  • LXI H, 2201H : Initialize pointer
  • MVI E, 00 : Sum low = 0
  • MOV D, E : Sum high = 0
  • BACK: MOV A, M : Get the number
  • ANI 0lH : Mask Bit 1 to Bit7
  • JZ SKIP : Don’t add if number is even
  • MOV A, E : Get the lower byte of sum
  • ADD M : Sum = sum + data
  • MOV E, A : Store result in E register
  • JNC SKIP
  • INR D : Add carry to MSB of SUM
  • SKIP: INX H : Increment pointer

Flowchart for program

24-Calculate the sum of series of odd numbers

Related Programs for Beginners: (Click down)

Calculate the sum of series of numbers

Count number of one’s in a number

Arrange in ascending order

Calculate the sum of series of even numbers