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针对并行端口设备开发的趋势及特点，提出了增强型并行端OEPP扩展的方案。在介绍了先进先出（FIFO）存储器IDT7201的基本原理之后，设计TIDT7201与EPP的接口电路，详细阐述了Windows3．x／95／98环境下通过EPP对FIFO存储器的编程步骤和方法。采用本文的设计解决了系统和并行喘口设备间进行数据传输时相互协调及同步的难题，实现了并行端口的高速双向数据传输。
Aiming at the trend and characteristics of parallel port equipment development, a scheme of enhanced parallel OEPP extension is proposed. After introducing the basic principle of the first-in-first-out (FIFO) memory IDT7201, the interface circuit of TIDT7201 and EPP is designed and the Windows3 is elaborated. Program Steps and Methods for FIFO Memory via EPP in x / 95/98. The design of this paper solves the problem of coordination and synchronization of data transmission between the system and the parallel surge device, and achieves the high-speed bi-directional data transmission of the parallel port.