Program to Find the smallest number in an array of data in 8085 Microprocessor

MicrocontrollerMicroprocessor8085

In this program we will see how to find the smallest number from a block of bytes using 8085.

Problem Statement

Write 8085 Assembly language program to find the smallest number from a block of bytes.

Discussion

In this program the data are stored at location 8001H onwards. The 8000H is containing the size of the block. After executing this program, it will return the smallest number and store it at location 9000H.

Logic is simple, we are taking the first number at register B to start the job. In each iteration we are getting the number from memory and storing it into register A. Then if B > A, then we simply update the value of Bwith A, otherwise go for the next iteration. Thus we can find the smallest number in a block of bytes.

Input

Address
Data
...
...
8000
06
8001
55
8002
22
8003
44
8004
11
8005
33
8006
66
...
...

Flow Diagram

Program

Address
HEX Codes
Labels
Mnemonics
Comments
F000
21, 00, 80


LXI H,8000H
Point to get array size
F003
4E


MOV C, M
Get the size of array
F004
23


INX H
Point to actual array
F005
46


MOV B, M
Load the first number into B
F006
0D


DCR C
Decrease C
F007
23
LOOP
INX H
Point to next location
F008
7E


MOV A, M
Get the next number from memory to Acc
F009
B8


CMP B
Compare Acc and B
F00A
D2, 0E, F0


JNC SKIP
if B <= A,then skip
F00D
47


MOV B, A
If CY is 1, update B
F00E
0D
SKIP
DCR C
Decrease C
F00F
C2, 07, F0


JNZ LOOP
When count is not 0, go to LOOP
F012
21, 00, 90


LXI H,9000H
Point to destination address
F015
70


MOV M, B
Store the minimum number
F016
76


HLT
Terminate the program

Output

Address
Data
...
...
9000
11
...
...
raja
Published on 22-Jan-2019 09:48:09
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