our Flash Tool(for firmware upgrade) can only support windows OS.
and to play games, PC is also supported.
ReaSnow S1 wil turns your controller into a Xbox 360 controller.
no controller is required to be connected to USB 1 port of S1,
so please just leave USB 1 open and connect your ms and kb to USB 2 and 3.
or connect your controller(gamepad) to USB 2 or 3.
S1 will enter PC mode automatically.