What is a psp modchip?

Answer 1

Actually, you don't need mod chip to play games from other countries because PSP games are region free.

The main purpose of the mod chip (it calls Undiluted Platinum chip) is to allow PSP to play homebrews and fix bricked PSP.

Answer 2

depends on what kind of mod chip it is. there are mod chips for psp that let u play japanese games or from another country. there are some where wen u play online, u can cheat by modifying (or customizing) your own cheats when you play online. It basically gives u power to modify anything on a psp. Note: IT COULD MESS UP YOUR PSP BADLY BY NOT TURNING ON PERMINATELY OR WORSE!!