如何增加一个选项启动为纯DOS，可以用来刷BIOS？
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我用的是FreeDOS启动盘.
我的方法很简单,编辑FreeDOS启动盘镜像,把BIOS更新程序、BIOS添加进去
run freedos.img
进入后和ms-dos一样操作，很快就完成。
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