有一点很重要，那就是要使用零调制解调器电缆，如果您使用普通的串行电缆，目标计算机则期望与串行设备通信，而不是与另一个串行端口通信，这样您就无法调试该计算机。

It is important that you use a null modem cable; if you use a typical serial cable, the target computer expects a serial device and not another serial port, and you cannot debug the computer.

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