chdman copy -i old.chd -o new.chd -f 5 Place the .chd file in the appropriate folder inside your MAME ROMs directory.

chdman verify -i game.chd To get info (size, compression, version, hunks):

from mamedev.org – the command-line version includes chdman .

roms/psx/ (system ROMs) roms/psx/game.chd (directly in system folder or in a subfolder) You can also specify full path in command line:

chdman createfloppy -i input.img -o output.chd Best practice:

for %f in (*.cue) do chdman createcd -i "%f" -o "%~nf.chd"

roms/ gamename.zip (the parent ROM) gamename/ (folder for CHD) gamename.chd Example for Killer Instinct :