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Multiplication of two number using Micro-controller

Aim: Write a program to multiply two 8-bit numbers stored in Register R0 and R1 and store the result at 4012 memory location using micro-controller kit.

Apparatus Used:  Micro-controller kit.

Assumption: Suppose the content of register R0 and R1 are 03H and 02H respectively. Write a program to multiply these values.
Algorithm: 

• Load data into Register R0 and R1.
• Move one data in Accumulator.
• Move other data in Register B.
• Now multiply A into B.
• Initialize memory location to store output.
• Store output at given location. 

Program:

Description of used instruction:

Register B: Generally used for multiplication and division.

MOV: Used for Load and Copy the Data. This copies a byte from the source location to destination.

MUL AB: This instruct multiply a byte of accumulator to byte of register B..

MOVX: This instruction transfer data between external memory and register.

DPTR: This is Data Pointer. It is used for containing 16 bit data or memory address.

SJMP: Short Jump loop is used for loop within program.

Result:

Input:   R0=03 H, R1=02 H

Output:  A=06 H and it will store at external memory 4012.

Procedure to look output:
            .   After ending (SJMP) the program, press Enter two times.

·         You will get message “Welcome to ------KIT”.

·         Press G and Provide initial address of program as in this program, starting address is 3000 H.

·         Press Enter.

·         After pressing Enter, You will get Message “Execution Completed”.

·         Press Reset on micro-controller KIT.

·         Press M and You will get Message “Enter Address”.      

·         Provide Address for Output as in this Program 4012 H and Press Space and you get Output.

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