Q. Program for interchanging the values of two Memory locations?

Program for interchanging the values of two Memory locations 

; input: Two memory variables of same size: 8-bit for this program

DATA SEGMENT

                        VALUE1 DB             0Ah                 ;Variables

                        VALUE2 DB             14h 

DATA ENDS

CODE SEGMENT

ASSUME CS:CODE, DS:DATA 

 MOV AX, DATA                                                      ; Initialise data segments

 MOV DS, AX                                                           ; using AX

 MOV AL, VALUE1                                                  ; Load Value1 into AL

 XCHG VALUE2,AL                                                 ; exchange AL with Value2.

 MOV VALUE1,AL                                                               ; Store A1 in Value1

INT 21h                                                                      ; Return to Operating system

CODE ENDS

END