.model small
.stack 100h
 
.data
 hwm db "Hello, world!$"
 
.code
 
start:
 mov ax, @data
 mov ds, ax
 mov es, ax
 
 mov ah, 9
 mov dx, offset hwm
 int 21h
 
 mov al, 0
 mov ah, 4ch
 int 21h
 
end start