8085 Program To Mask Upper Nibble

In this program, we are going to write an 8085 Program To Mask Upper Nibble in the 8085 microprocessor with a program flow chart and explanation of the program.

8085 Program To Mask Upper Nibble

Program Statement

Write an assembly language program to mask the upper nibble of an 8-bit number. Assume that the 8-bit number is stored in the accumulator. Store the result in register B.

Explanation of Program

• We have to mask the upper nibble i.e. we have to separate the upper nibble and in the result, only the lower nibble should be present.

e.g. : A = 67 H    
A       : 0 1  1  0   0 1 1 1 
0FH : 0 0 0 0    1  1 1 1  (Logically AND with 0FH) 
----------------------------
A       : 0 0 0 0    0 1 1 1  (Result)

Assembly Language Program

Instruction	Comment	Operation
ANI 0F H	Logically AND 0FH with the contents of the accumulator.	A = 07 H
MOV B, A	Store the result in register B	B = 07 H
HLT	Terminate program execution	Stop

Flow Chart of Program

Sr. No.	Name of the 8085 Programs
1.	Write a program to load the data into the accumulator and any register.
2.	Write a program to exchange the contents of memory locations.
3.	Add two 8-bit numbers.
4.	Subtract two 8-bit numbers.
5.	Add two 16-bit numbers.
6.	Subtract two 16-bit numbers
7.	Find the 1’s complement of a Number
8.	Find the 2’s complement of a Number
9.	8085 Program To Mask The Lower Nibble
10.	8085 Program To Mask The Upper Nibble
11.	8085 program to pack the two unpacked BCD numbers
12.	8085 program to Unpack the two packed BCD numbers
13.	8085 program to find the sum of a series of 8-bit numbers
14.	8085 Program to sort the numbers in ascending order
15.	8085 Program to sort the numbers in Descending order
16.	8085 Program to Multiply Two 8-bit Numbers
17.	8085 Program to Divide 16-bit number by 8-bit number
18.	8085 Program to Find the Number of Negative Numbers in Array
19.	8085 Program to Find Maximum Number in Array
20.	8085 Program to count the number of 1’s in a register