She runs the extraction. The emulated Windows environment churns. Eighteen minutes later, a raw binary appears: SIMPSONS_HIT_RUN_USA.raw . No filesystem, no partition table. Just a byte-for-byte copy of a GameCube optical disc, complete with error correction codes and BCA (burst cutting area) data that would let a real console authenticate it.

Before we look at the "how," we must understand the "why." You cannot repack a file you cannot edit.

If the original game disc contained multiple tracks (such as separate red-book audio tracks common in PlayStation 1 or Sega CD games), chdman will automatically output a .cue sheet and one or more .bin files instead of a single .iso .

Ensure you used extractcd rather than extractraw for audio-track games (like PS1). Conclusion

Tools like CHDMAN GUI or NamDHC act as visual wrappers for the command-line utility.

-o : Output CUE file (it will automatically generate the corresponding .bin files).

Your CHD file might be corrupted. Ensure it was properly ripped or downloaded.

Or, for a more direct conversion (if supported):

Download the MAME tools package and extract chdman.exe into the folder where your target CHD file is located. Step 2: Open Command Prompt

mkisofs -o output.iso /path/to/directory

For more advanced users or those on different operating systems, the chd2iso command-line tool can be used: