Playstation Portable Firmware and PSP Home Brew

Executive Summary About PSP Firmware By Pranay Deepak Rupani

When Sony first released the PSP, it had no restrictions. Custom Firmware

Custom firmware replaces your PSPs official firmware but it is not a permanent upgrade. You can easily uninstall the custom firmware and to back to official firmware if you don’t like or don’t want to use custom firmware anymore.

psp firmware downgrade

Custom Firmware has all the features of the official Sony firmware, but also adds the ability to load homebrew PSP ISOs and PSX EBOOTs directly from the game menu in the XMB. Custom Firmware also has an option to use ‘No-UMD Mode’ so you can run your PSP ISOs without a UMD inserted. when you see ‘connect your PSP to your computer and make a USB connection’, Turn off your PSP, take the memory stick out of your PSP and insert it into your memory card reader. In the past, running network update would upgrade to the vanilla Sony firmware, removing home brew functionality. This new custom firmware has all the features the 4.01 official firmware has plus a few extras. I have 4.01 M33-2 custom firmware installed already on my phat PSP and I haven’t encountered any bugs yet. Here are the instructions on how to install the new custom firmware on your PSP.

A Fat PSP or Slim PSP already installed with a custom firmware. At least 3.52 M33-4 custom firmware must be installed on your Fat PSP and 3.60 M33 for the slim.

Step A - Installing the 4.01 M33 custom firmware

1. Connect your PSP to your computer using the USB cable. Open the Step A folder and copy the UPDATE folder to ms0:/PSP/GAME/. After copying, disconnect the PSP from your computer.

2. On the XMB menu on your computer, navigate to GAME > Memory Stick and run the 4.01 M33 update.

3. The Sony Updater will run. Don’t turn off your PSP or interrupt the update.

4. Congratulations, your PSP is installed with 4.01 M33 custom firmware now. On your memory stick, navigate to PSP/GAME and delete the UPDATE folder.

Downgrading the Firmware on Your PSP

Executive Summary About PSP Firmware By Sandra Maria Stammberger

It will also look at options of downgrading the firmware for your PSP, and what the associated risks and benefits are.

Firmware is a software program designed to permanently reside in the read only segment of your PSP’s hard drive. When new games or movies are purchased, they automatically update the unit with the latest version of firmware. So for those PSP owners who have a desire to utilize their so-called ‘home brew’ programs, their only option may be to downgrade the firmware on their unit. Please keep in mind that there are also risks involved with attempting to downgrade your firmware. A drawback to downgrading the firmware is that some new media may actually require the newest firmware to operate.