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Count number of one's in a number

Statement: Write a program to count number of l's in the contents of D register and store the count in the B register.

Sample problem 1:

(2200H) = 04

(2201H) = 34H

(2202H) = A9H

(2203H) = 78H

(2204H) =56H

Result = (2202H) = A9H

Source program :

MVI B, 00H
MVI C, 08H
MOV A, D
BACK: RAR
JNC SKIP
INR B
SKIP: DCR C
JNZ BACK
HLT

Flowchart for program

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Count number of one's in a number