assume cs:code ,  ss:stack

code segment
    db 'Welcome to masm!',0
code ends

stack segment

  dw 8 dup (0)
stack ends

code segment
    _start:mov dh,8
           mov dl,3
           mov cl,2
           
              mov ax,code
              mov ds,ax

              mov ax,stack
              mov ss,ax
              mov sp,16
     
           mov si,0
           call show_str
           
           mov ax,4c00h
           int 21h
           
     show_str:
               push si                      ;si记录字符串读取地
                                            ;dh记录行地址
                                            ;dl记录列数地址
               push cx                      ;ch记录读取字符
               push ax                      ;al记录字符属性
               push bx                      ;bx用来存放行的基础地址
               push dx
               
               mov  ax,0b800h
               mov  es,ax
        
                  mov ah,0
               mov al,0a0h
               mul dh
               mov bx,ax
               
               mov dh,0
               mov si,dx
               
               mov  al,cl
               mov  cl,0
              
          print: mov ch,ds:[si]                 ;如果ch为0，则跳出循环
          jcxz _out
                 mov es:[bx+si],ch
                 inc si
                 mov es:[bx+si+1],al
                 add dl,2
               jmp short print
      
         _out: pop dx
               pop bx      
               pop ax
               pop cx
               pop si
               ret
code ends

end _start

巴嘎我知道了...

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

data segment
    db 'Welcome to masm!',0
data ends

stack segment

  dw 8 dup (0)
stack ends

code segment
    _start:mov dh,8
           mov dl,3
           mov cl,2
          
              mov ax,data
              mov ds,ax

              mov ax,stack
              mov ss,ax
              mov sp,16
    
           mov si,0
           call show_str
          
           mov ax,4c00h
           int 21h
          
     show_str:
               push si                      ;si记录字符串读取地
                                            ;dh记录行地址
                                            ;dl记录列数地址
               push cx                      ;ch记录读取字符
               push ax                      ;al记录字符属性
               push bx                      ;bx用来存放行的基础地址
               push dx
              
               mov  ax,0b800h
               mov  es,ax
       
                  mov ah,0
               mov al,0a0h
               mul dh
               mov bx,ax
              
               mov dh,0
               mov si,dx
              
               mov  al,cl
               mov  cl,0
             
          print: mov ch,ds:[si]                 ;如果ch为0，则跳出循环
          jcxz _out
                 mov es:[bx+si],ch
                 inc si
                 mov es:[bx+si+1],al
                 add dl,2
               jmp short print
      
         _out: pop dx
               pop bx     
               pop ax
               pop cx
               pop si
               ret
code ends

end _start

debug调试到mov ax，b800h时依然崩溃

搬砖中 楼主结题的时候记得给我点分

切分

抢台词

好吧我已经做出来了...30分就这么没了，天哪坑爹的有木有啊...

再来几个切分的先，T版说得好啊，不以散分为目的的散分就是耍流氓，所以我不能耍流氓，啊...睡一觉先

z版那个masmplus汇编编辑器：

data segment
db 0
data ends

code segment
 mov ax,data
mov ax,data这一句怎么成非法的了？有什么办法能改成合法的吗？

mov ax, seg data

行不行呢 不同版本有不同是正常的