哪来的这么多错误呀？23个呢啊。。。

assume cs:code,ds:data

data segment
   
  db 'Welcome to masm!',0

data ends

code segmnet

start: mov cl,2
       mov ax,data
       mov ds,ax
       mov si,0
       call show_str

       mov ax,4c00h
       int 21h

show_str:mov ax,0b800h
       mov es,ax
       mov di,0
       mov bl,cl
     s:mov cl,[si]
       mov ch,0
       jcxz ok
       mov es:[di],cl
       mov es:[di+1],bl
       add di,2
       inc si
       jmp short s
    ok:ret

code ends
end start

编译有23个错误，怎么回事啊？
[解决办法]
code segmnet写错了，
单词拼写错误，楼主大意了