NCU 上的七段显示码：
"." 表示“An error was identified in the cyclical operation.” 一个错误是确定的周期性运作。
"0" 表示“Real mode may have been switched to Protected mode.” 真正的模式可能已经切换到保护模式。
"1" 表示“Start of download from the PCMCIA card.” 开始下载PCMCIA卡。 (Number with decimal point 号码小数点） 表示：“The number of the module that has just been downloaded appears
on the status display.” 在一些模块，刚刚被下载上的状态显示。
"2" 表示“Download from the PCMCIA card has ended successful.” 下载PCMCIA卡已经结束成功。
"3" 表示“The debug monitor is initialized.” 调试监测初始化。
"4" 表示“Operating system was downloaded successfully.” 操作系统成功下载。
"5" 表示“Operating system has started up.” 操作系统启动。
"6" 表示“NCK software is initialized.” NCK 软件初始化。