Saturday, September 12, 2009

Calculate the sum of series of odd numbers(8085)

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:
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
INR D : Add carry to MSB of SUM
SKIP: INX H : Increment pointer

1 comment:

  1. its incomplete WRONG program
    where the hell you are storing the result?????
    and where the hell you are decrementing the counter hanh!!????
    INX H should be at 6th line above the back loop...LOLz