I had already seen that, but the file they put there is v1.8 and I am looking for 2.1, just in case

Do you have a photo of the back of the cartridge? PCB photos? Those can really help identify what cart you have.I have a copy of r4 3ds and I'm looking for the kernel but the page is down, can someone help me?
how can i do that?¿Tienes una foto de la parte posterior del cartucho? ¿Fotos de la placa de circuito impreso? Esas pueden ayudarte a identificar qué cartucho tienes.
Los enlaces están inactivos después de que intenté buscarlos en Wayback.

Simple. Take a photo of the R4 card from both sides.how can i do that?