MAME ROM pack includes many encrypted ROMs so it's not recommended for inexperienced users. Make sure the ROM has no encrypted parts before use. Note: Core doesn't support encrypted ROMs.
We use the term in general to refer to any disc image file, but depending on the disc tracks it might be necessary to use different extensions like. An ISO File might not necessarily have the. In general many people use the term ROM to refer to ISOs. While ROMs come from cartridges, ISOs are optical disc based dumps, such as CD's and DVD's. In emulation, ISOs are also games, the difference relies in the source material. For the purpose of emulation, ROM files are dumped from the cartridges and stored and shared over the internet. ROM stands for Read Only Memory and refers to a type of memory that cannot be modified and stays intact after the device is powered off.
ROMs are the games that are stored inside video game cartridges.