自己写的一个对PC并口进行的操作程序，以及对数据的读入后，进行的波形显示。（需要硬件支持 D24/56 PCI i/o接口板）-himself wrote a parallel port on PC operating procedures, and to read into the data, the waveform shows. (D24/56 need hardware support PCI i / o interface board)