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Multiply two 8-bit numbers

Statement: Multiply two 8-bit numbers stored in memory locations 2200H and 2201H by repetitive addition and store the result in memory locations 2300H and 2301H.

Sample problem 1:

(2200H) = 03H

(2201H) = B2H

Result = B2H + B2H + B2H = 216H

= 216H

(2300H) = 16H

(2301H) = 02H

Source program :

LDA 2200H
MOV E, A
MVI D, 00 : Get the first number in DE register pair
LDA 2201H
MOV C, A : Initialize counter
LX I H, 0000 H : Result = 0
BACK: DAD D : Result = result + first number
DCR C : Decrement count
JNZ BACK : If count 0 repeat
SHLD 2300H : Store result
HLT : Terminate program execution

Flowchart for program

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Multiply two 8-bit numbers