@andrewvalentine

I was in your position not long ago! I’ve learned a lot since then!

Assuming you’re running the most recent version of RetroPie! Follow this post to sort out the XinMo:

104433

No need to patch the kernel, simply go through the terminal and run “sudo nano /boot/cmdline.txt” to add the “usbhid.quirks=0x16c0:0x05e1:0x040” entry or take your SD card and plug it into a PC which will give you access to the cmdline text file.

Good luck!