How to force route USB 2.0 devices off XHCI controller on Z97?

[maxtch]

Me being an electronics hobbyist means my machine often have a lot of weird stuff hanging on its USB ports. That results in me running out of USB resources very often under Windows 10.

 

From a forum post somewhere I have ran across the claim that the XHCI controller in Intel Z97 chipset is bugged: instead of supporting 128 endpoints as specified in USB standards, it supports only 96 endpoints. When I checked the Device Manager under Windows, all my USB devices shows up under the XHCI controller. With all the weird items I have and that bugged chipset implementation I quickly ran out of endpoints on that Intel XHCI controller, thus running out of the resources Windows was being vague about.

 

I know for sure that through some kernel-level software the USB 2.0 devices can be multiplexed away from the XHCI controller and to the two EHCI controllers on the same chipset. Since I use that machine primarily as a Hackintosh, one of the USB kexts (in macOS a kext is a kernel mode driver) forces that multiplexing to happen, and under macOS with that additional driver I can verify that my USB 1.1 and USB 2.0 peripherals shows up under the EHCI controller while only USB 3.0 devices shows up under the XHCI controller. Intel’s EHCI implementation does not have that lack of endpoint bug.

 

Is there any way to implement a similar force-non-USB-3.0-devices-off-XHCI patch for Windows?