The following code changes are necessary to use software-generated irqs.

要使用软件生成的IRQ，需要对代码进行如下修改。

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In a software project, discovering that a use case does not contain the necessary categories of information to move forward can be at best costly-at worst, disastrous.

在软件项目中，如果发现用例不包含继续前进所必需的信息类型，那么后果起码是代价惨重—甚至是灾难性的。

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Microsoft says you don't need external software to run these, but I found it was necessary, and even then had to use a trick I found on the Web to get it to work.

微软说，你无需外部软件来运行这些硬件，不过我发现还是有必要的，即使是有了外部软件，我还是不得不用了我在网上找到的一个小窍门才成。

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