PSP: Customfirmware 3.90 m33-2 out now!

Written by Tech84 on February 14, 2008

Taken from the readme file:


– 3.52 M33-3 or higher


– Copy UPDATE folder to /PSP/GAME and run the program.

If you are in 3.90 M33, that’s all needed.
If you are in previous version, you need to download 390.PBP and put it in same folder or let
the program to download it for you.


– Improvements in plugins loading code:
  * Fixed some problems with problematic cards due to filesystem not mounted.
  * Now plugins should read the faster.
  * Problem fixed with lines with spaces at the end.

– Added the rest of regions to the recovery option fakeregion.

– (PSP SLIM): Added patches in nand ipl to allow Booster multiiplloader and TimeMachine iplloader to boot from nand.

Note: only 3.90 M33-2 and higher can be booted from nand in slim with those ipl loaders,
      not official Sony firmwares or previous versions of M33.

Changes in updater:

– The 3.90 eboot downloading code is now more stable, no more freezes after selecting AP
– Memory stick write in the 3.90 downloading code is delayed the maximum possible for faster operation
(the system prefers big chunks of data written at once).

Download the update here.

I’ll be putting up a simple tutorial on installing custom firmwares for your psp sometime soon.. =)

You may also like:

 Posted in PSP, PSP Downloads, PSP News, Tech,

9 Responses to “PSP: Customfirmware 3.90 m33-2 out now!”

  1. Eman says:

    i have problem going to my psp root mode.
    plase tell me ho to put IRSHELL on my psp me by video

  2. toji says:

    root mode? just extract the “UPDATE” folder to you psp game directory:


    where X is the drive of your psp

    the link seems to be broken?

  3. Omar says:

    where can i find this UPDATE file ???

  4. jakz says:

    how do i get ir shell v3.90 m33-2

  5. adam says:

    Jakz i wanna know too

  6. Emulation 64 says:

    I think this i the address for M33 —

  7. Jay Pea says:

    that’s the link to Dark Alexe’s PSP web site

  8. Tarro says:

    I love my PSP and everything about it. It can play music, videos, games, pictures it even has a web browser, but there is a flaw in this entertainment pack, it is too delecate(that is why I gave it 4 stars) and it does not come whith a case or a handstrap and I allredy need a new faceplate. It comes with a Ceramic White PSP With a silkscreen portrait of Darth Vader on the battery cover, the ac adapter, charger, the battery, and the Star Wars Battlefront Renegade Squadron game(only for the PSP). That said the psp is the best console out there(next to the WII and Nintento DS might I add). And I will buy psp for my friend’s birthday.

Leave a Reply

Looking for something?

Use the form below to search the site:

Still not finding what you're looking for? Drop a comment on a post or contact us so we can take care of it!

Visit our friends!

A few highly recommended friends...