; Machine code
 BB 11 01 B9 0D 00 B4 0E 8A 07 43 CD 10 E2 F9 CD 20 48 65 6C 6C 6F 2C 20 57 6F 72 6C 64 21
 ; Assembly language
 org 7C00h
 use16

 jmp code
 nop

 db 'hellowrd'
 SectSize  dw 00200h
 ClustSize db 001h
 ResSecs   dw 00001h
 FatCnt    db 002h
 RootSiz   dw 000E0h
 TotSecs   dw 00B40h
 Media     db 0F0h
 FatSize   dw 00009h
 TrkSecs   dw 00012h
 HeadCnt   dw 00002h
 HidnSec   dw 00000h

 code:

 cli
 mov ax, cs
 mov ds, ax
 mov ss, ax
 mov sp, 7c00h
 sti

 mov ax,0b800h
 mov es,ax

 mov di,200
 mov ah,2
 mov bx,MessStr
 msg_print:
 mov al,[cs:bx]
 mov [es:di],ax
 inc bx
 add di,2
 cmp bx,MessEnd
 jnz msg_print

 loo:
 jmp loo

 MessStr equ $
 Message db 'Hello, World!'
 MessEnd equ $