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