What (Android, Raspberry Pi, PC) are you setting up?
If you are trying to run MAME 0.139 after applying an UPD, you may see these errors: mame 0139 romset download upd
Disclaimer: This article is for educational and archival purposes only. The author does not host or provide links to copyrighted ROM images. Always check your local laws regarding digital preservation. What (Android, Raspberry Pi, PC) are you setting up
Once you have your ROM set, setting it up is straightforward. If you're using MAME4droid, simply copy the .zip files (do not unzip them) into the /sdcard/MAME4droid/roms folder on your Android device. For other emulators, specify the path to your chosen ROM directory in the emulator's settings. Upon launching a game, the emulator will read the required data from the ZIP archive. Always check your local laws regarding digital preservation
: The parent game contains the main files. Clone versions (like a Japanese release of a US game) only contain the files that are different from the parent. Pros : Saves a massive amount of storage space.