Friday, 10 November 2017

How to multiply two numbers in 8085 , 8085 multiplication program with explanation

How to multiply two numbers in 8085 , 8085 multiplication program with explanation


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 DNEXT: 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.


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