为充分利用CPU的运行效率，采用中断功能设计并行输入输出接口，以达到缓解CPU高速运行速度与外设低速缓冲间的矛盾。-To take full advantage of the efficiency of CPU operation, interruption of functional design using parallel input-output interface, in order to alleviate the CPU speed and high-speed periphera

人机交互中的输入确认，以及由于字符对字符输入输出缓冲的缺点的处理-HCI input confirmation, as well as the shortcomings of the characters on the character input and output buffer processing