PSP Custom Firmware 3.71 M33 Released!!

Sunday, September 23rd, 2007
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3.71 M33 Released!!

PSP Custom Firmware 3.71 M33

M33 / Dark_AleX have worked yet another Custom Firmware wonder by releasing PSP Custom Firmware 3.71 M33 today.

3.71 M33 by M33=Dark_AleX

Changes in 3.71 M33:

- Now uses 3.71
- VSH Menu is not longer launched using HOME key, but using SELECT now. This is to not
interfere with the XMB function of home, which is now more useful in this firmware.
- Psp Slim: umdcache was allocating memory even when homebrew was launched, wasting
memory that homebrew programs may want to use. Now umdcache module is stopped before
it can allocate any memory, only in the case homebrew is launched.

Also, memory is unprotected for user memory usage by M33 core (only when homebrew is launched).
Developer, for a sample of how to use the extra memory, see the extra ram sample of the M33 sdk.

- Both version boot now from 3.XX ipl, and are independent of 1.50.

The main installer will not install 1.50 kernel anymore.
A 1.50 kernel addon for 3.71 M33 that will install inside 3.71 M33 will be released in a
few days (for fat only)

Note: due to some changes in kernel nids by Sony, you can expect a lot of kernel plugins not working anymore.
Programmers: refer to the sdk readme for details.

So there you have it, Time I think to visit the M33 website and donate.

Download: (You need both files. Read the readme.txt file in the M33 zip for instructions)
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>> Our Forum Thread for Installation help, 3.71 discussion etc is HERE

***Update: For the newest M33 custom firmware please go here  ***

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  • Nate

    hi guy’s new psp user here, just need some help how can I access the recovery mode? my psp version is already 3.71 m33-2 when I bought it then I tried to access recovery mode but it does’nt work also I installed 1.50 add on it will go as far as to show me a black screen then it says ” this program only works on standard psp” is there any other way for me to access recovery mode?

  • http://www.google.com Vbgolf

    I can’t find where you download the file…

  • http://www.google.com Vbgof

    One more thing, my psp fat is running 3.95 official firmware

  • Shady

    Hay Guys I was Wondering is there any custom firmware to run umd dumper without pandora battery?? send me a email plz

  • shady
  • http://pspslimhacks.com Dark_AleX

    LOL!

  • shane

    FFS so many nubs askin tha same fckin question, yes u need a magic memory stick and pandoras battery to downgrade ur psp to use CFW

  • some guy

    i really dont understand anythin, ive got a psp slim that i just upgraded to 4.05 but i really want some sort of custom firmware can someone plz email me the steps on jp_to_cool_for_you@hotmail.com

  • http://google.com Re:some guy

    Go to yu tube search ‘PSP CFW’ all yu need to know.

  • Luke

    Can someone please help me? i have official psp firmware version 3.95 and how or which custom firmware do i download so i can play cso games?

  • Luke

    and i have a normal psp, not a slim if that has any impact.

  • PSP-Lover

    Can someone help me how do you download this?

  • skeftomilos

    Hm,foolish things,I can find tutorials on youtub!

  • Luke.H

    luke_10a@hotmail.com
    can someone please give me step by step instuctions on how to get a cso file on to my official 3.95 normal psp firmware?

  • Knight

    Hi i kind of have psp slim with a custom firmware 4.05 which i upgraded without a backup, now could pls some1 tell what to do from the start cuz i just bought a new one and have no idea abt all this, like wat should i download do degrade it and how do i put games in it.Pls sum1 help me……….
    thnx

  • Qwertyuiop

    can u download custom firmware on psp slim

  • http://ss phily poop boi

    i dont want to stupid hack i need to download

  • http://ss phily poop boi

    and
    ur psp can get damaged when u make a little mistake in hackin thats bad:( mine got hacked:(

  • http://ss phily poop boi

    ok if u like basketball go to freestyle.sierraonline.com its fun

  • http://ss phily poop boi

    tell me ur name if u getin one k??

  • http://BoomBox-Creations.deviantart.com/ BoomBox-Creations

    Just wondering, im going to update my PSP from this firmware to 4.02m33, but when i do update it, ive been not starting it because the updater looks too much like the official update and i dont want to go back to the official because i paid someone $50 to CFW it for me, and i REllY dont want to go back to official firmware.

    so if the installer screen is supposed to look like the official installer, please tell me, and whoever answers, all help is appreiciated =D

    thanks for your time, BB-C

  • spike

    how do i download psp game’s and put them on my psp thx for helping

  • tteizeen

    is this compatible for my psp 3.93. please explain.

  • Sanjay

    Hi Just Bought a PSP with 3.71 M33 & a m\new memory stick.
    How do i install ISO games using my new memory stick

  • Justin

    Just wondering, how do I get the custom firmware on my (slim) PSP (I have 3.71)? And is there a chance that it could crash my PSP or make it unusable? I’m doing it to try to play original playstation (PS1) games on my PSP.

  • shash

    hi I have a psp with version 4.01 can I downgrade it to 3.71 without using pandora battery.plz help.dark_alex PLZ do something.

  • samDman

    can someone pls help me i hav no idea wat any of this means!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! pls tell me weather we can upgrade to ANY custom firmware without making a pandora battery ???????? all i want 2 do is to play iso/cso games thats it. rite now im usin official psp firmware 5.02 which i got from NETWORK UPDATE so could someone pls help!!!!!!!!!!!!!!!!!!!!!!!!!!!! type step by step instructions wid links to get the downloaads pls!!!!!!!!!!! thanks

    REMEMBER: my parents wont let me mess wid my battery or anything.

  • Élizé

    Like all the others, I would like to know how to put Custom Firmware on my PSP Slim.
    If theres a way to do it without an Pandora Battery (I tried to do one but didn’t work:P) and without and Magic Memory stick.

    Or, If its possible to do it without a Pandora battery but with an Magic Memory Stick.

    Its to be able to run UMD dumper!

    Thank You

  • Ronnoc

    i av 5.03 ofw how do i get 5.00 m33 cfw w/o pandora

  • http://www.cracktutorial.com Monnifer

    Great quality stuff.

  • http://www.maximallen.com jesse

    where do I download this and does it give ur psp any viruses?

  • CrAsH

    how to delete custom firmware from psp?

  • jean

    hi im trying and trying and when i want to upgrade with a costom firmware it keep on saying file coruped what must i do please email me at jansauto11@telkomsa.net

  • pieretr

    lallalalala

  • manish

    please can some tell me how to hack psp 3000 or psp 3004 i have both the psp’s my email id is manishbyatroy@gmail.com

  • Mark

    Manish i pretty sure that you cant hack psp3000. Not yet anyways.You will have to wait till they find a way to hack the psp3000…

  • lil ariez

    hey…i upgrade my psp fat to version 6.60 and i thought it wil improve my psp, but after that i cant play any games, what should i do? anyone can help me solve this prob….thankssss

    • Razor887

      Just instal 6.60 pro b9 watch YouTube

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