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A     #bEn
      JNB   _002                        // 條件跳轉(zhuǎn)
      L     #Dw1                        //DW1裝入AR1
      L     #Dw2                        //DW2裝入AR2
      +D                                //AR1+AR2=AR1
      L     #Dw3                        //AR1裝入DW3
      +D                                //AR1+AR2=DW4
      L     #Dw4                        //DW4裝入AR1中
      +D                                //AR1+AR2=DW5
      L     #Dw5                        //DW5內(nèi)容裝入AR1中
      +D                                //AR1+AR2=AR1
      T     #Sum1                       //AR1傳入SUM1
      L     5                           //SUM1內(nèi)容裝入AR1
      /D                                //AR1除于5結(jié)果存入AR2中
      T     #wRsl                       //AR1傳入wrs1
_002: NOP   0


怎樣理解呀！