2/09/2009

MaximumTransferSize is oboslete after Win2000

MaximumTransferSize member of the USBD_PIPE_INFORMATION structure is obsolete after Win2000. Systems after win2000 don't care about this value anyway.The USB stack ignores the value in MaximumTransferSize for both composite and non-composite devices, this values will be set to the default.The default values of MaximumTransferSize under Vista are listed below.


1. http://msdn.microsoft.com/en-us/library/ms790486.aspx
2. http://msdn.microsoft.com/en-us/library/ms793357.aspx

2/03/2009

"CTS" is not supported by USBSer.sys?

The usbser.sys assumes that the device has always signaled CTS.
The RTS/CTS hardware handshaking is not implemented in usbser.sys.