This paper introduce the working principle and design program of the Error Code Display Card which is base on PC ISA bus.

介绍了基于微机IS A总线的微机故障代码显示卡的工作原理和设计方案。

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If at any point in the code, an error occurs such that processing cannot continue, we retrieve the system error message (if any), and display it along with our own message.

如果代码中任何一处出现了使处理不能继续进行之类的错误，那么我们会检索系统错误消息(如果有的话)，然后将它与我们自己的消息一起显示。

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This is a way to display error messages or diagnostics; the code has a number of examples of diagnostic messages sent to this stream, many of them commented out in the release.

这是一种显示错误消息或诊断消息的方法；代码将大量诊断消息示例发送到这个流中，其中很多在发行版中已经被注释掉了。

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