Fix: You need a multi-region BIOS or swap dc_flash.bin with a region-free version. Flycast allows region forcing: Quick Menu → Options → Dreamcast Region → USA/Europe/Japan .

: After configuration, start the Dreamcast emulator through Emudeck and verify that it recognizes the BIOS. Some emulators will display the BIOS version in their settings or during boot-up.

: Emulation/bios/dc/ (Create the dc folder if it’s missing and move your files there).