Thread: Custom Firmware 3.90 M33

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UPGRADE TO PSP CUSTOM FIRMWARE 3.90 M33
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REQUIREMENTS:

- Installation requires a fully charged PSP with firmware 3.52 M33-3 or higher.
......... (NOTE: Upgrade is strictly for PSP Custom firmware M33 version... don't attempt if your unit is not an M33 version)
- This instruction refers as X=Enter and O=Back.

UPGRADE INSTRUCTION:

FROM YOUR PC:
- Download and unrar the PSP390m33-Base.rar to any folder
... Download here at sendspace --> [Only registered and activated users can see links. ]
- Connect your USB cable from PC to PSP (then select USB Connection on your PSP)
- Create a folder named UPDATE under /PSP/GAME/ (PSP Memory Stick)
- Copy the downloaded 390.PBP and EBOOT.PBP files to /PSP/GAME/UPDATE

FROM YOUR PSP:
- Disconnect the USB by pressing O.
- Select Game, Memory Stick and press X.
- Run the "PSP Update ver 3.90" and the update will be done by Sony updater. At the end, you will be asked to reboot the PSP, press X.
- Check your PSP unit by selecting Settings, System Settings, Sytem information ... PSP should display System Software = 3.90 M33
- Delete the "PSP Update ver 3.90" from the Game, Memory Stick after the installation
- Done. Enjoy using your Skype and other additional functionalities on your PSP.

Changes:
- 3.80 -> 3.90
- March33 NO UMD: fixed (yet another) bug related with exiting with home. (infinite semaphore wait)

For added information, please read the thread opened by Spiral --> [Only registered and activated users can see links. ]
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I upgraded my PSP Slim/Lite Custom Firmware from 3.80 M33-4 to 3.90 M33
and here is the screenshot of the skype main page:



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can upgrade directly frm 3.71 M33-4?

Yep, no worries there.... then you can update to 3.90M33-2 using the network update... super..

Originally Posted by lalaboy

can upgrade directly frm 3.71 M33-4?

As mrralphman says, it will work on your 3.71 M33-4.

You can even upgrade it if your unit is as low as 3.52 M33-3.
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Hi, i just got a psp (yesterday) could someone please tell me why i need to upgrade my firmware, & how do i find out what firmware i have, many thanks for any help.

Originally Posted by cosycat

Hi, i just got a psp (yesterday) could someone please tell me why i need to upgrade my firmware, & how do i find out what firmware i have, many thanks for any help.

First congratulations for your new PSP .
Which firmware do you have ?
I have the 3.52m33 . and i dont need to upgrade it until now ..as all the games work perfectly .

You can search about the new features included in every new Firmware released ( exp : 3.90) and you can decide if you want to upgrade or not .

@cosycat,

Yes, as Spiral said, you'll have to check your PSP version.
I guess it must be an original PSP version (like plain 3.51, 3.60, 3.71...) from Sony Corporation and not a Custom Firmware version (particularly the M33 version) developed by Dark Alex.

If you plan to flash your unit with M33 version, you need a pandora battery and a memory stick (with program to flash your PSP) to install the M33 Custom Firmware version developed by Dark Alex.

For me, because I don't have a Pandora battery and a memory stick (with files and program) to flash my PSP, I go to a shop that provides these services. Initially, my unit has an original Sony PSP version. They put the pandora battery and their Mem Stick on my PSP, reboot the unit and flash it with the 3.71 M33 version.
(Pandora battery is more expensive than an ordinary PSP standard battery. It has a tweaking program installed inside to push the M33 version inside the PSP. Also, there are programs and files on on the memory stick that flashes the PSP to M33 version)

What is the advantage of having an M33 custom firmware version compared to an Original Sony PSP version?
Well, there's a lot of PSP games out there on the web that can be downloaded and run on an M33 versions. My friend here in the Philippines has (over 200) games in his file and I downloaded only the 50 games I like.
For an Original Sony PSP version, you cannot run those downloaded games. You'll have to buy an original UMD games from the store.

After that, I upgraded my PSP unit myself to higher M33 version. First I applied the 3.80 M33 then the 3.80 M33-2. Lately I applied the 3.90 M33.

3.80 has included the internet radio
3.90 has included the skype feature.

It's true that there are games that could only run on lower version and could not run on higher version. However, most of them are upward compatible up to 3.90 M33. Some says there are games that goes slower on higher version but I could not verify these with the games I usually played.

You may have these as your references:
[Only registered and activated users can see links. ]
[Only registered and activated users can see links. ]

P.S. PSP is a nice birthday present.
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Many thanks cabanerofr, & spiral, i think i understand a bit better now.

I am still runnign 3.80M33. I'm waiting until there is a popsloader available for the new 3.90 version.

Oh and for the record, creating a pandoras battery itsn't that difficult for those who want to try it out. There is a chance that you could end up with a brick, but I haven't experienced it and I've made quite a few batteries.