@zoz I know the post is a bit old, but if I understand the title correctly, I strongly advise against using Recalbox on a Raspberry Pi model 1B (rev. 2).

Recalbox is a great system, but for an Rpi1B, it doesn't run well. I speak from experience.

If you want a system for the Rpi1B go with Retropie. Yes, I know, it's a pain in the ass to set up, but it's the best I've tested for this hardware.

SNES games and even some PS1 games will run better on Retropie using mostly standalone emulators.

I even created my own image using Retropie to run on Rpi1B and Rpi Zero.