Atma Xplorer

This part is for installation of the 3.71 Firmware. Note that you must meet the requirements before proceeding or you may end up bricking your PSP.

Installing 3.71 M33 on 3.52 M33

Requirements:

• PSP Phat with 3.52 M33-3 or greater or PSP Slim with 3.60 M33 (follow this guide if you’re PSP is still OFW)
• PSP battery that’s at least 78% full
• &n The 3.71 M33 and installation file
• Set the kernel to 3.52: do this by (hard) booting your psp while holding the R button. Go to Configuration, look for the kernel configuration and set it to 3.52

Installation of 3.71 M33 on 3.52 M33-4:

• Extract the 3.71 M33 files to your computer.
• Copy the Update folder to X:/PSP/GAME/ on your PSP’s memory stick.
• Download the official 3.71 update and rename to 371.PBP.
• Copy the 371.PBP to the directory; X:/PSP/GAME/M33CREATOR/ on your PSP’s memory stick.
• Run 3.71 UPDATE under GAME on your PSP
• Press X if asked to correct idstorage keys
• Continue to install the official 3.71 SONY when prompted
• After all process is complete, press X. Your PSP will reboot.
• Congratulations, you’ve just installed 3.71 M33

Now in order to switch from 3.71 M33 to 3.80 M33, you need update 4 of 3.71

Installation of 3.71 M33-2 on 3.71 M33:

• Download 3.71 M33-2 and extract it to your computer.
• Copy the Update folder to X:/PSP/GAME/ on your PSP’s memory stick.
• Run 3.71 M33-2 UPDATE under GAME on your PSP
• After all process is complete, press X. Your PSP will reboot.
• Congratulations, you’ve just installed 3.71 M33-2

To install 3.71 M33-3 and 3.71 M33-4, just repeat the steps above using the files provided. As a precaution, format your Memory Stick or delete all used files before proceeding. After which you can proceed to the next installation.

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