Newbe here, just what are the mod chips 4 ?

[Warlock]

Put simply, Original games contain data that cannot be copied by a cd burner. A mod chip along with a boot disc is used to inject the code to the PS2 telling it that the backup is a original and allowing it to boot. depending on what version PS2 you have Messiah is the best chip followed by Origa-chip then neo2.5. Dont waste your time with neo4. To many wires and to little performance