Writing on unknown EEPROMs can brake your computer. DIMMs contain an EEPROM and if you overwrite it somehow your computer will not boot anymore. Reading using 16bit addressing (i.e. not using the -8 switch) on a 8bit EEPROM can actually WRITE to the EEPROM. Be careful. The following chips use 8bit mode: 24C01 24C02 24C04 24C08 24C16 Bigger ones use 16bit addressing so you must not use -8. More could need it, check data sheets. If you are not sure about what you're doing DON'T use this tool.