This problem occurs because the maximum port speed that is supported in Windows 2000 Service Pack 3 and earlier versions of Windows 2000 is 115,200. Windows 2000 Service Pack 4 and later versions support port speeds up to 921,600.
我已经是sp4了。串口调试器2002 build 2.0405.01试过是可疑到921600的。是程序不行,打不开串口
This problem occurs because the maximum port speed that is supported in Windows 2000 Service Pack 3 and earlier versions of Windows 2000 is 115,200. Windows 2000 Service Pack 4 and later versions support port speeds up to 921,600.