Chd Files - For Mame
If a game used a mechanical storage device (HDD, CD, LaserDisc) in the arcade cabinet, MAME needs the CHD to emulate that specific piece of hardware.
mame psx game
chdman extractcd -i game.chd -o output.cue chd files for mame
If you have an old CHD (v3 or v4) and want v5: If a game used a mechanical storage device

