Sega-101.bin Mpr-17933.bin -

The "MPR" prefix is a dead giveaway for Sega's IC part numbers. MPR-17933 is the mask ROM used in the original Japanese Mega-CD (Model 1). This BIOS boots to a blue screen with a holographic "Mega-CD" logo. Many Japanese exclusives (like Snatcher or Keio Flying Squadron) or games with region-locking code will refuse to boot if you try to run them using sega-101.bin. The emulator needs to see the correct regional BIOS strings.

If you have the files but the game still won't boot, check these three things: sega-101.bin mpr-17933.bin

If you want, I can: compute likely checksums and suggest matching ROM entries if you provide file sizes or checksums, or show commands to inspect these files locally. The "MPR" prefix is a dead giveaway for