DEMUL and MAME have different requirements. MAME prefers "split" sets (where parent ROMs contain shared files), while older versions of DEMUL sometimes preferred "merged" sets.
: This corresponds to 1_004_01.bin (CRC: 5454841F ), which is an early Japanese BIOS. How to Fix the "Missing MPR" Error To resolve the error in Demul, follow these steps: demul mpr 21931 ic501 repack
Obtain a Sega Dreamcast BIOS pack. Due to legal reasons, these are not included with the emulator. DEMUL and MAME have different requirements
A "repack" in emulation circles refers to: demul mpr 21931 ic501 repack
: Specifically associated with the Dreamcast BIOS v1.01d.
If you are looking to verify or use this file in DEMUL: