7.1到7.9节接口设计的例子采用前几章介绍的技术和设备。为了引起对每种接口设计特点的注意提出了一系列相关的例子。第一个 例子是简单的基本接口。每增加一个例子都在前个例子的基础上增加逻辑线路实现几个附加特性。第一个例子是最简单的读/写接口。这个线路增加一些逻辑形成程序控制接口,这种接口再增加一些线路构成中断服务接口,直至 Examples of interfaces designations 7.1 to 7.9 use the techniques and equipment described in the previous chapters. A series of related examples are presented to draw attention to the design features of each interface. The first example is a simple basic interface. Each additional example adds logic to the previous example to achieve several additional features. The first example is the simplest read / write interface. This line adds some logic to form a program control interface, which adds a few lines to form the interrupt service interface until