MULTIPLICATION OF TWO 8 BIT NUMBERS

MULTIPLICATION OF TWO 8 BIT NUMBERS

AIM:
     To perform the multiplication of two 8 bit numbers using 8085.
    
ALGORITHM:
     1) Start the program by loading HL register pair with address of memory location.
     2) Move the data to a register (B register).
     3) Get the second data and load into Accumulator.
        Add the two register contents
     4) Check for carry.
        Increment the value of carry.
     5) Check whether repeated addition is over and store the value of product and carry
        in memory location.
     6) Terminate the program.

    
PROGRAM:
            MVI D,00         Initialize register D to 00
            MVI A,00         Initialize Accumulator content to 00
            LXI H,4150
            MOV B,M        Get the first number in B - reg
            INX H
            MOV C,M        Get the second number in C- reg.
LOOP:    ADD B            Add content of A - reg to register B.
            JNC NEXT       Jump on no carry to NEXT.
            INR D             Increment content of register D
NEXT:     DCR C           Decrement content of register C.
            JNZ LOOP      Jump on no zero to address
            STA 4152       Store the result in Memory
            MOV A, D
            STA 4153       Store the MSB of result in Memory
           HLT               Terminate the program.


OBSERVATION:
                  FF (4150)
    Input:
                  FF (4151)
                  01 (4152)
    Output:
                  FE (4153)
                 
RESULT:
Thus the program to multiply two 8-bit numbers was executed.