可以用于各种并口方式(SPP,EPP,ECP)的读写测试。-can be used in various ways parallel port (SPP, EPP, and ECP) literacy test.

This a good tutorial about interfacing with the parallel port more inportantly reading from the port. Other articles I ve seen only shown how to write to the port. Before I get ahead of myself, the parallel port I used is an ECP (Extended Capabi