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关于6678的中断问题



大家好:

据6678的数据手册介绍6678的中断控制器(INTC)允许最大数目为128的系统事件来产生12个CPU系统中断。为什么在下图中会有这么多的事件输入?我算了一下不止128个啊,不知道我哪里理解错了,希望大家指教,多谢!