Specifies a single directory where NVRAM files are stored. NVRAM files store the contents of EEPROM and non-volatile RAM (NVRAM) for systems which used this type of hardware (e.g. battery-backed RAM installed into game cartridges or BIOS CMOS memory). This data is read at startup and written when MESS exits.

The default is nvram (that is, a directory nvram in the same directory as the MESS executable).

If this directory does not exist, it will be automatically created.

mess -nvram_directory <path>