LARGEST NUMBER IN AN ARRAY OF DATA

AIM:

     To find the largest number in an array of data using 8085 instruction set.

     

ALGORITHM:

     1) Load the address of the first element of the array in HL pair

     2) Move the count to B – reg.

     3) Increment the pointer

     4) Get the first data in A – reg.

     5) Decrement the count.

     6) Increment the pointer

     7) Compare the content of memory addressed by HL pair with that of A - reg.

     8) If Carry = 0, go to step 10 or if Carry = 1 go to step 9

     9) Move the content of memory addressed by HL to A – reg.

     10) Decrement the count

     11) Check for Zero of the count. If ZF = 0, go to step 6, or if ZF = 1 go to next step.

     12) Store the largest data in memory.

     13) Terminate the program.

     

PROGRAM:

             LXI H,4200 Set pointer for array

             MOV B,M    Load the Count

             INX H         Set 1st element as largest data

             MOV A,M

             DCR B         Decrements the count

LOOP:  INX H

             CMP M          f A- reg > M go to AHEAD

             JNC AHEAD

             MOVA,M   Set the new value as largest

AHEAD:DCR B

             JNZ LOOP     Repeat comparisons till count = 0

             STA 4300     Store the largest value at 4300

             HLT

OBSERVATION:

                   

    Input: 05 (4200) ----- Array Size

                   

    Output: 0A (4201)

                F1 (4202)

              1F (4203)

                26 (4204)

                FE (4205)

                FE (4300)

    

RESULT:

Thus the program to find the largest number in an array of data was executed