Every time I boot a new pi I always attach a keyboard mouse combo to it. It allows me to navigate easier. When I have a problem with BT controller too. I sometimes run into an issue setting a controller up where wrong button was pushed and won't change back or something. I'll use my keyboard and mouse combo to navigate to controller settings and map it again.

On keyboard
A, S keys work as A, B buttons
Arrow keys are direction pad.
Enter is start
Space is select
Page up, Page down are R, L

On mouse in menus
Left click is select option
Right click is back

I resolved the issue by adding uhid to /etc/modules.conf, so that it is loaded at system start.

@strodown Hi , thank you for your answer. Can you give me a link to download a 6.1 version : I only found a link for the 6.1.1 version ...

@thegamingmineblo which default famicom roms? Are you using a custom recalbox image?

I'm also testing the netplay functionality and i am not able to get it running. I have 2 PCs with Recalbox 18.06.27 (x86_64), both with identical settings and roms and connected to the internet.
When i start the host on the first PC and try to join from the second PC it always says:
"Failed to initialize netplay."

I tried with catsfc and snes9x (no snes9x_2010)
I scraped and hashed all my roms
And in Netplay Lobby i get the green Ok result (Rom and core match).
But still it does not work ("Failed to initialize netplay" on the PC that tries to join the host).

++UPDATE++
Problem solved! It was the UPnP-Settings in my Router. I activated UPnP and now it works 🙂

@substring I have not tried/downloaded any n64 roms because of the spotty performance reviews, but I did see they had a special mapping for n64 on the x gaming website that was hyperlinked.

@dummello

Hi to you. Absolutely nothing understood. You have a game and it launches another games?

thank you. i am still a novice with that roms

xarcade works only in Recalbox 4.0.0 https://github.com/recalbox/recalbox-os/wiki/XArcade-configuration-(EN)