Barry, I could make a crippled subset of features that would operate on USB 1.1, but it would be a considerable amount of FPGA logic redesign and driver software changes. If it added a feature that would benefit anyone, I might do it. But, I feel like a trained seal being forced to jump through hoops. Who has a computer with USB 1.1 ? Anyway, the reason I started on this quest was because I thought you needed USB-IF certification to pass WHQL. But, I have just discovered that you can self test using the USB20CV program and feed the log file into WHQL. So, I am going to see if I can side step the issue that way.
BTW, the official "no silent failure" rule is here:http://compliance.usb.org/index.asp?UpdateFile=Policies&Format=Standard#13