Restriction and Bug
-------------------
-Not statble yet.
+Not supported/confirmed yet.
+ Hub, suspend, keyboard LED
+
+Switching power on VBUS:
+ To power reset device.
+ http://www.circuitsathome.com/camera-control/simulating-cable-disconnect-on-usb-host-shield-2-0
+ This is needed for a device which are not initilized with 'USB Bus Reset'(long SE0)
+
+Can't bus-reset a keyboard which already attached on bus properly.
+ Slow start up of Leonardo's bootloader causes this?
+ Need to unplug/plug a keyboard after firmware starts up.
+ MAX3421E doesn't work SAMPLEBUS well to know whether device connected or not.
+
+Keyboard with other endpoints than boot keyboard may go wrong.
+ On my keyboard with mouse key the converter locks up when using mouse key function.
+
+Can't compile on Windows filesystem.
+ On Linux no problem.
+ Windows doesn't know difference between common/print.h and arduino/Print.h.
+ Change file name common/print.h to console.h ?