How to debug windbg and Vm

1. Check whether port COM1 of the host meets the requirements. (My computer -- properties -- hardware -- Device Manager -- port -- COM1 -- port settings)

The "number of bits per second" for "Port Settings" on the host is 115200; "Data bit" is 8; "parity" is none; "Stop bit" is 1, and "Flow Control" is none;

2. Check whether the serial port is enabled after the VM starts the system. (In the lower-right corner of the VM, the serial port is unavailable)

In the VM's "Virtual Machine Settings" settings, the following three items in "use named pipe" are \. \ PIPE \ com_1 and this
End is the client, the other end is an application

3. Check whether the debug mode is enabled for your system startup Item. (Vm...

[Boot loader]
Timeout = 30
Default = multi (0) disk (0) RDISK (0) Partition (1) \ WINDOWS
[Operating systems]
Multi (0) disk (0) RDISK (0) Partition (1) \ Windows = "Microsoft Windows XP Professional"/noexecute = optin/fastdetect
Multi (0) disk (0) RDISK (0) Partition (1) \ Windows = "Microsoft Windows XP Professional"/noexecute = optin/fastdetect/debug/debugport = COM1/baudrate = 115200

Or

Multi (0) disk (0) RDISK (0) Partition (1) \ Windows = "Microsoft
Windows XP Professional "/noexecute = optin/fastdetect/debug/debugport = com2/baudrate = 115200

Whether to choose COM1 or com2 depends on the serial in the VM
Port2 or serial port to confirm

[Reference]

1, http://bbs.pediy.com/archive/index.php? T-125072.html

2. http://blog.csdn.net/zxb2007/article/details/6081397