@Aterlom said in LR-FBNeo Diagnostic Input (dip switches) not working:
I have modified the line of the retroarch-core-options.cfg Diagnostic Input = “shift” in case the combination HK + Y would work.
Core options are lists of available choices, you can't just throw random arbitrary values at them and expect it will work. Neither shift nor hk+y are valid choices
@Aterlom said in LR-FBNeo Diagnostic Input (dip switches) not working:
I have tried all the options offered by the diagnostic input in the core options menu.
Assuming you really did that at some point instead of trying to force random stuff by editing files, and pressed the correct inputs matching your choice, i'm not 100% sure what's your problem here. I know not using a dedicated button for retroarch's hotkey button (the one you use to open retroarch's menu) can cause various problems if the core is using holding mecanisms with the same button (let's say you are using start as your retroarch hotkey, using "hold start" as your diagnostic input might not work because retroarch won't send the input to the core when it is held), maybe that's what you are doing. The only other logical conclusion would be that your "keyboard" device can't hold keys for the 60+ frames required and/or is affected by some kind of ghosting.
@Aterlom said in LR-FBNeo Diagnostic Input (dip switches) not working:
I have read a lot of documentation
The only documentation you are supposed to read is a 1-liner though : https://docs.libretro.com/library/fbneo/#dipswitches