Hello new emulator by default (bluemsx) new bios are necessary.
## BIOS ##
- BlueMSX (EMULATOR MSX BY DEFAULT) :
You must download the BlueMSX standalone version, available to this adresse : http://bluemsx.msxblue.com/rel_download/blueMSXv282full.zip
Then extract the "Databases" and "Machines" folders and add them to the bios folder of your recalbox