程序代码：

assume cs:code , es:data , ss:stack

data segment

  db 'welcome to masm!'

data ends

stack segment

  dw 8 dup (0)

code segment

  start:  mov ax,0b800h
          mov ds,ax
        
          mov ax,data
          mov es,ax
     
          mov bx,0
          mov si,40h
          mov cx,16
          mov ah,00000010b
          call print
          mov ah,00100100b
          call print
          mov ah,01111001b
          call print
            
           mov ax,4c00h
           int 21h

        print:  push bx
                push si
                push cx
            
          go:   mov al,es:[bx]
                mov ds:0f00h[si],al
                mov byte ptr ds:0f00h[si+1],ah
                add si,2
                inc bx
         loop go
              pop cx
              pop si
              add si,00A0h
              pop bx
              ret
code ends

end start