@matchaman I saw that image too, but didn't look into it, because I thought its a SIM card. So, these are essentially Nano sd cards. But they are only produced by Huawei, so maybe not a standard soon. https://nasilemaktech.com/nm-card/

Hello, are you sure that emulator have binded "right key" ? I mean, if emulator doing something when you press right arrow on keyboard?

@BuZz said in usb audio and mame4all incompatibility ?:

@rig if you have a rpi3, you will find lr-mame2003 a better emulator.

Yea, I have lr-mame2003 but I don't use it as much. when I first started using mame I played a few roms on both emulators and came to the conclusion that mame4all worked better. By "worked better" I mean that the sound was cleaner/clearer on a few games and the video resoulution looked sharper on a few games. However I have run into exceptions-- I use lr-mame-2003 for St Dragon because it sounds much better compared to mame4all; I also play x-men on lr-mame 2003 becsuse the sprite shadows look better.
I didn't run a thorough test and I could be mistaken. Maybe I should give lr-mame2003 another go. What do you mean specifically by lr-mame2003 being a better emulator?
I can say that I do prefer lr-mame4all over mame4all because of the retroarch support.

p.s. I am using a rpi3

It seems to be impossible with no experience people like me, in editing the Retropie Scripts.
Maybe someone can help if i edit the main question/ the solution i am looking for.

My Pi is used by a couple of Kids. Even small Ones (5 to 9)
I am looking for the possibility that someone without knowledge is just using a simple accessible menu option in retropie and is seconds later logged in as superuser in a graphical, noobfriendly and Mouse equipped environment.

Even if i delete the desktop entry in the ports section, so that a little knowledge is needed to do something with the blinking cursor after quitting emulation station (remember the first touch wir MS-Dos 5 :-)
There is the Problem that i manually can't run the "secret command" startx because it runs then my installed Kodi.
Kodi itself is simple lockable through masterlock.

Any ideas, for the little security i try to insert in the retropie machine?
Thanks in advance