The Play Station Portable system software is the official firmware for the Play Station Portable.
In this article I am going to walk you through the steps required to upgrade the firmware on a PSP device.
If the power supply is lost while writing to the system software, the console will no longer be able to operate unless the system is booted in service mode or sent to Sony for repair if still under warranty.
The current version of the software, 6.61, was made available on January 15, 2015.
Because there are three different ways to update, the first step is to choose which one you'll use.
Read the instructions for each if you're not sure, and choose the one that fits best for you.