I am on 6.1-dragonblaze and I definitely need to tell the emulator the cartridge type.
Since it was an auto-update, is it possible some elements didn't get updated?

I don't know how it behaved before, it's the first time I put the 5200 roms.

C'est beau toute cette poésie...

Wow, very great project. Good job! It looks close to the original NES feeling. Love it