维修扶梯时从单片机At89C51内读出来的，闲着没事对其进行反汇编，并且加了注释。显示采用了双色的8X8点阵，扶梯停止时显示红色的X，扶梯运行时显示l绿色移动的->。附有PROTEUS仿真文件，可以直接模拟运行显示。(When the maintenance of the escalator was read from the single chip microcomputer At89C51, it was disassembled and annotated. Display usin