DOSSEG .MODEL LARGE .STACK 200h .DATA hello db 'Hello world!$' helloLen db 14 .CODE ASSUME CS:@CODE, DS:@DATA START: mov ax,@data mov ds,ax ; Write 'Hello world!' to the screen mov ah,09h ; 'print' DOS service mov dx,offset hello ; string to write int 21h ; call DOS service ; Terminate program mov ax,4C00h ; 'exit' DOS service int 21h ; call DOS service END START