我的程序为何不能在电脑屏幕显示三行WELCOME TO MASM

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assume cs:code,ds:data,ss:tble
  data segment
   db 'welcome to masm!'
   db 02h,24h,71h
  data ends

  tble segment
  dw 8 dup (0)
  tble ends

  code segment
start: mov ax,data
mov ds,ax
mov ax,tble
mov ss,ax
mov sp,10h
mov ax,0b872h
mov es,ax
mov si,0
mov di,0
mov bx,0
mov cx,3
s1: push cx

mov cx,16
s0: mov al,ds:[si]
mov es:[di],al
mov al,ds:[bx].10h
mov es:[di+1],al
inc si
add di,2
loop s0

mov si,0
inc bx
add di,120h
pop cx
loop s1

mov ax,4c00h
int 21h

code ends
end start