Write a program to exchange the contents of memory locations.

Program 1:

Let the contents of memory location D000H be 10H and the contents of memory location D001H be 20H.

Instruction	Comment	operation
LDA D000H	Load data from memory location D000H to accumulator	A = 10 H
MOV B, A	Store data in B register	B = 10 H
LDA D001H	Load data from the memory location D001H to the accumulator	Load data from the memory location D001H to accumulator
STA D000H	store data of Accumulator to memory location D000H	D000H = 20H result
MOV A, B	Reload data in accumulator from B register	A = 10 H
STA D001H	store data of Accumulator to memory location D001H	D001H = 20H result
HLT	Stop	Stop

Result: D000H = 20H and D001H = 10H. i.e. the contents of the memory locations are exchanged.

Instruction	Comment	Operation
LXI H, D000H	Initialize HL register pairs as a pointer to memory location D000H.	HL = D000H H = D0 H L = 00 H
LXI D, D001H	Initialize DE register pairs as a pointer to memory location D001H.	DE = D001H D = D0 H E = 01 H
MOV B, M	Get the contents of memory location D000H into the B register	B = 10H
LDAX D	Get the contents of memory location D001H into the accumulator.	A = 20H
MOV M, A	Get the contents of memory location D000H into the B register	D000H = 20H result
MOV A, B	Copy the contents of B register into accumulator	A = 10H
STAX D	Store the contents of the accumulator in memory location D001H	D001H = 10H result
HLT	terminate program execution	stop

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
21.	8085 Program to Calculate the sum of a series of even numbers
22.	8085 Program to find the square of numbers
23.	8085 Program to find the smallest number in the array