在APPLE-Ⅱ与TP-801之间的通讯中，利用了计算机的磁带输入输出接口，信号的传输完全用软件实现，而不需要任何硬件。
The input output port of recorder in the equipment is used to communication of APPLE ⅱ and TP 801 . The modem of signals has been accomplished by using software completely without any hardware .
计算机输入输出接口