各位大神帮忙看看       刚刚接触通讯   不懂      谢谢各位了      尽量详细点      







M1000                MOV        H4D          D50
                                   MOV        H30          D51
                                   MOV       HD            D52
                                   MOV        HA            D53
                                  SET           M1161




     M1002                MOV    H81          D1120    
  
                                  SET             M1120    
                                 MOV         K200     D1129



    M1000                      RST        M1143
                                     RS      D50     K0         D80       K18
                                     SET         M1122