ASSEMBLER x86 (DOS, FASM) Hello World Example

; FASM example of writing 16-bit DOS .COM program
; Compile: "FASM HELLO.ASM HELLO.COM" 
  org  $100
  use16    
  mov  ah,9
  mov  dx,xhello
  int  $21    ; DOS call: text output
  mov  ah,$4C
  int  $21    ; Return to DOS
xhello db 'Hello world !!!$'