ASM program to multiply two 8 bit numbers using 8051 instruction set

AIM: To perform multiplication of two 8 – bit numbers using 8051 instruction set.

ALGORITHM:

1. Get the data in A – reg.
2. Get the value to be multiplied in B – reg.
3. Multiply the two data
4. The higher order of the result is in B – reg.
5. The lower order of the result is in A – reg.
6. Store the results.

PROGRAM:

        ORG	4100
        CLR	C
        MOV	A,#data1
        MOV	B,#data2
        MUL	AB
        MOV	DPTR,#4500
        MOVX	@DPTR,A
        INC	DPTR
        MOV	A,B
        MOVX	@DPTR,A 
HERE:	SJMP	HERE

OBSERVATION:

Input:	80
	80
Output:	00 (4500)
	19 (4501)

RESULT:

Thus the program to perform multiplication of two 8 – bit numbers using 8051 instruction set was executed.