8085 program to exchange content of HL register pair with DE register pair

In this program we will see how to exchange the content of DE and HL pair.

Problem Statement

Write 8085 Assembly language program to swap the content of HL and DE register pair.

Discussion

This process is very simple, 8085 has XCHG instruction. This instruction swaps DE and HL pair content. We are storing some values to DE and HL pair directly, and then exchange them using XCHG.

Input

DE = 5678H
HL = CDEFH

Flow Diagram

Program

Address	HEX Codes	Mnemonics	Comments
F000	16, 56	MVI D,56H	Load D with56H
F002	1E, 78	MVI E,78H	Load D with78H
F004	26, CD	MVI H,CDH	Load D with CDH
F006	2E, EF	MVI L,EFH	Load D withEFH
F008	EB	XCHG	Exchange the content of DE and HL
F009	76	HLT	Terminate the program

Output

DE = CDEFH
HL = 5678H

Rishi Rathor

Updated on: 30-Jun-2020

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