If you’re just trying to run Sonic Boom or Dinosaur King in MAME, ignore this. But if you’re chasing:
💡 : To resolve errors involving this file, ensure you have the full "bios" or "device" ROM set for the Sega Billboard hardware (often named segabill.zip ), as MAME now categorizes these shared files as separate device dependencies. Epr-18022.ic2 Mame Download
epr-18022.ic2 is a specific ROM chip image required to run Sega Model 2 If you’re just trying to run Sonic Boom
: If you are using a "Split" or "Merged" set, you might be missing the parent BIOS file. Switching to a Non-Merged Epr-18022.ic2 Mame Download