# Multiply two 8 bits number | 8086 Microprocessor

Here, we are going to learn how to multiply two 8 bits numbers using assembly program in 8086 Microprocessor?
Submitted by Ayush Sharma, on October 31, 2018

Problem statement:

Write a program in 8086 microprocessor to multiply two 8-bits numbers, where numbers are stored from offset 500 and store the result into offset 600.

Algorithm:

1. Load data from offset 500 to register AL (first number)
2. Load data from offset 501 to register BL (second number)
3. Multiply them (AX=AL*BL)
4. Store the result (content of register AX) to offset 600
5. Stop

Program:

400MOV SI, 500SI=500
403MOV DI, 600DI=600
406MOV AL, [SI]AL<-[SI]
408INC SISI=SI+1
409MOV BL, [SI]BL<-[SI]
40BMUL BLAX=AL*BL
40DMOV [DI], AXAX->[DI]
40FHLTEND

Explanation:

1. MOV SI, 500 set 500 to SI
2. MOV DI, 600 set 600 to DI
3. MOV AL, [SI] load contents of offset SI to register AL
4. INC SI increase value of SI by 1
5. MOV BL, [SI] load contents of offset SI to register BL
6. MUL BL multiply contents of register AL and BL
7. MOV [DI], AX store the result (contents of register AX) to offset DI
8. HLT End.