If merging doesn't work, the ROM needs a hard repack using a decryption tool.
emulator, it means your Dreamcast BIOS files are missing, incorrectly named, or in the wrong folder. Here is how to fix it for your repack: 1. Identify the Missing File mpr-21931.ic501 demul mpr 21931 ic501 repack
If you are manually assembling a "repack" or BIOS set, verify the files against these known standards: mpr-21931.ic501 : Standard US/World BIOS. mpr-21068.ic501 : Early Japanese BIOS. mpr-21933.ic501 If merging doesn't work, the ROM needs a
If you are looking to verify or use this file in DEMUL: If merging doesn't work