Thanks @OyyoDams, I have the bios.
It appears that it only works if I upload the roms directly from the osx finder (and not from the web interface.

Hi everyone,

I'm prety new here.
I've tested a lot of rom's on a lot of different consoles (nes, supernes, gamegear,...) I works great!
But I can't use any rom for the playstation 1 neather the dreamcast.
For exemple, I have a game for playstation with 2 files (.bin and .cue)
If I put those files on my recalbox, the name of the game appears on the emulator interface, but the game does not open
Same problem with the dreamcast (with .bin and .gdi files)
Can anyone help?

Thanks,