: No more scrolling through dozens of files for a single game. Your frontend (like LaunchBox or EmulationStation) will only see one entry per title.
stands for Compressed Hunks of Data . Originally developed by the MAME team for arcade disc images, it was later adopted across CD-based console systems like the Sega CD, PlayStation 1, and Sega Saturn.
You used a newer chdman (e.g., V6) and the emulator only supports V5. Recreate the CHD with chdman -c none (uncompressed) then recompress using an older chdman (MAME 0.200 era).
First, a necessary disclaimer: If you do not own the original Sega Saturn discs, downloading CHD ROMs is illegal in most jurisdictions. This article is for educational purposes and for owners of physical media looking to preserve their collections.
(a simple text file listing the .chd filenames) to allow the emulator to swap discs seamlessly during gameplay. Internet Archive sample batch script