# Free Electronic Circuits & 8085 projects

## Calculate the sum of series of even numbers

Published on Nov 17 2009

Statement: Calculate the sum of series of even 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 8 bit number so you can ignore carries and store the sum at memory location 2210H.

Sample problem 1:

2200H= 4H

2201H= 20H

2202H= l5H

2203H= l3H

2204H= 22H

Result 22l0H= 20 + 22 = 42H

= 42H

 Source program : LDA 2200H MOV C, A : Initialize counter MVI B, 00H : sum = 0 LXI H, 2201H : Initialize pointer BACK: MOV A, M : Get the number ANI 0lH : Mask Bit l to Bit7 JNZ SKIP : Don’t add if number is ODD MOV A, B : Get the sum ADD M : SUM = SUM + data MOV B, A : Store result in B register SKIP: INX H : increment pointer DCR C : Decrement counter JNZ BACK : if counter  0 repeat STA 2210H : store sum HLT : Terminate program execution Flowchart for program

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Calculate the sum of series of numbers