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用仿真器程序可以在5402里跑，但.out 文件通过hex500转化为 hex . 再通过hpi 接口下到 ram 里跑步起来。
用仿真器跟一下boot过程， 看主机有没有把代码加载进来？ 如果加载进来， 看一下0x7f处的程序入口地址是否正确？另外， 检查一下MP/MC管脚是否拉低了
