The files must be named exactly dc_boot.bin and dc_flash.bin . Corrupt BIOS File: Ensure your BIOS dump is valid.
If you are using RetroArch, all BIOS files across all emulation cores are centralized in a single directory. Dreamcast Bios Flycast
: The system flash memory, which stores regional settings, time, and language. 🕹️ Additional Arcade BIOS (Optional) The files must be named exactly dc_boot