8085 program to check whether the given number is even or odd

In this program we will see how to check whether a number is odd or even.

Problem Statement

Write 8085 Assembly language program to check whether a number is odd or even.

Discussion

The Odd Even checking is very simple. we can determine one number is odd or even by checking only the LSb. When LSb is 1, the number is odd, otherwise it is even.In this program we are taking a number from memory and then ANDing 01H with it. if the result is nonzero, then the number is odd, otherwise it is even.

Input

first input

Address	Data
. . .	. . .
8000	15
. . .	. . .

second input

Address	Data
. . .	. . .
8000	2C
. . .	. . .

Flow Diagram

Program

Address	HEX Codes	Label	Mnemonics	Comments
F000	3A, 00, 80		LDA 8000H	Load the number from memory
F003	E6, 01		ANI 01H	AND 01H with Acc content
F005	CA, 0D, F0		JZ EVEN	If Z = 0, it is Even
F008	3E, 01		MVI A, 01H	Load 01H to indicate it is Odd
F00A	C3, 0F, F0		JMP STORE	Jump to store
F00D	3E, FF	EVEN	MVI A, FFH	Load FFH to indicate it is Even
F00F	32, 50, 80	STORE	STA 8050H	Store the result into memory
F012	76		HLT	Terminate the program