print_string

;
; A boot sector that prints a string using our fuctions.
;
org 07c00h    ; Tell the assembler where this code will be loaded
  mov ah, 00eh

  mov bp, 08000h
  mov sp, bp

  mov bx, HELLO_MSG
  call print_string

  jmp $

print_string:
  mov al, [bx]
  or al, al
  je end
  int 0x10
  inc bx
  jmp print_string

HELLO_MSG:
  db "Hello, World!"

  ; Padding and magic BIOS number
end:

  cli
  hlt

  times 510-($-$$) db 0
  dw 0aa55h