format MZ

;entry .code:start

segment .data

data1   db      52H
data2   db      29H 
total   db      ?
msg:    db      "Hello, World!", 0

segment .code

start:
 push ax       ;move as to ax
 push es 
 mov ax,0b800h ; Start at memory 0b800 
 mov es,ax     ; move video address to es register
 xor di,di     ; zero di register
 mov cx,2000   ; set counter 25 lines by 80 chars.
 mov al,30h    ; character to write 0 for testing
 mov ah,31     ; character attribute blu bg white fg
 ;mov ax,0720h ; Black bg, white fg, 20h = space char

 rep stosw     ; move ax to video memory
 pop ax 
 pop es

 mov ah,2h
 mov bh,0
 mov dh,24
 mov dl,10
 int 10h

 mov ah,0      ; get keypress
 int 16h
done:
 mov ah, 4Ch   ; dos terminate function
 int 21h