: Open DEmul, go to Config > Plugins and Paths , and set the ROMs Path to the folder you just created.
The Dreamcast BIOS files must be packed together inside a compressed archive named dc.zip . If this zip file is corrupt or missing the specific Japanese/Universal chip dump, the error triggers. Step-by-Step Guide to Fixing the Error demul mpr21931ic501 2021
Place the dc.zip file directly into this roms folder. 3. Verify BIOS in Demul Open Demul. Go to Config -> BIOS -> Dreamcast . : Open DEmul, go to Config > Plugins