8 May 2013

LARGEST NUMBER IN AN ARRAY OF DATA

Hi Friend here i am written ALP For LARGEST NUMBER IN AN ARRAY OF DATA

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                       COMMENT


LXI H,4200                  Set pointer for array
MOV B,M                      Load the Count
INX H
MOV A,M                     Set 1st element as largest data
DCR B                           Decrement the count
LOOP: INX H
CMP M                          If A- reg > M go to AHEAD
JNC AHEAD
MOV A,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

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