Assuming you have legally dumped your BIOS files (or are testing them in a lab environment), here is the standard configuration guide:
Each file corresponds to a specific region. Emulators use them to determine which games can be launched based on their region lock: sega_101.bin (Japan BIOS) : Required for playing Japanese (NTSC-J) games. mpr-17933.bin (USA/Europe BIOS) sega-101.bin mpr-17933.bin
In modern computing, these files are used by emulators (such as Kega Fusion, Genesis Plus GX, or RetroArch) to recreate the Sega CD environment. Typically placed in a "System" or "BIOS" folder. Assuming you have legally dumped your BIOS files
Furthermore, the preservation scene is now pushing for "Redump" verified BIOS sets. The holy grail is finding a v1.00 US BIOS versus the common v1.01, as certain prototype discs only boot on the older firmware. sega-101.bin (v1.01) is the standard, but sega-100.bin (v1.00) is the collector's item. Typically placed in a "System" or "BIOS" folder
BIOS files are copyrighted software owned by SEGA. While emulators are legal, distributing or downloading these BIOS files is technically a violation of copyright law. The safest way to acquire them is to dump them from your own physical hardware using a tool like a Retrode or a Mega EverDrive.