Update README.md

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@ -91,13 +91,17 @@ Example of NES-controller wiring:
- If you got no errors, test in Windows with `Control Panel -> Game Controllers` or in Linux with `jstest /dev/input/js0`
### Linux and more than one controller with one Arduino
Linux usbhid-module doesn't support out of box multiple controllers with one USB without USB-hub-features (I'm not sure about this, but I didn't manage to get multiple /dev/js-devices without this). You have to give parameter
Linux usbhid-module doesn't support out of box multiple controllers with one USB without USB-hub-features (I'm not sure about this, but I didn't manage to get multiple /dev/js-devices without this).
#### Solution 1
You have to give parameter
`quirks=0x2341:0x8036:0x40` (first numbers are VID and PID of adapter) to usbhid-module. Here is example how to do it with RetrOrangePi 2.5.2:
- Make backup of `/boot/boot-retro.cmd` and `/boot/boot.scr`
- Edit `/boot/boot-retro.cmd` setenv bootargs -line and add `usbhid.quirks=0x2341:0x8036:0x40` to kernel parameters.
- `sudo mkimage -C none -A arm -T script -d /boot/boot-retro.cmd /boot/boot.scr`
- Reboot
#### Solution 2
Another possibility is change VID and PID to something that already has HID_QUIRK_MULTI_INPUT (0x40) activated in kernel.
Here you can see what quirks are activated to different VID/PIDs: