2.5/2.6 Downgrader - [TESTED - BRICK MAKER] - PSP Forum

Nitrus · 06-28-2006, 01:22 PM

Check this out.

Quote:

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Downgrader Test for 2.50/2.60 by Dark_AleX

This is an *experimental* downgrader for 2.50/2.60

Experimental means here that it has not been tested on a real device, althought it has a theoretical base that it could work.

This software is free and untested, and i'm not responsable if it causes damages to your psp.
If you use this software, you agree that you are using this program at your own risk and that you won't blame the author for that.

"Someone told me that a downgrader for 2.50/2.60 was impossible. How does this work?"

This one uses another more risked technique (and i repeat: untested) than the mph downgrader.
It uses some sony libraries found in the 1.50 updater to perform the most critical steps, the logical format of the flash, and the ipl writing. See technical details for more info about how it works.

This software requires that someone with a 1.50 runs a little program and send you the output so you can init the downdate process. (by legal reasons i cannot provide those files directly, that's why this is needed).
The 1.50 program is TOTALLY safe, it only dumps the flash of a 1.50 user and it also extracts some special prx's found in the 1.50 updater.

Instruction for the 1.50 user
-----------------------------

1) Copy the folders downhelper and downhelper% from the folder 1.50 HELPER folder to /PSP/GAME/ in your memstick.

2) Obtain the 1.50 updater and put it in /PSP/GAME/UPDATE in your memstick.

Some download links for it:

http://www.psphacks.net/files/PSPFirmwares/1.5/

3) Init the downhelper program.
It will dump your flash and some files from the updater eboot to the memstick.

4) After that, the program will exit. You can now delete the updater from /PSP/GAME/UPDATE

5) You'll notice that you have a new folder in the root of your memstick called "DOWNDATER".
That's the folder you'll have to send to a 2.50/2.60 to let him test the downgrade.

Instructions for the 2.50/2.60 user
-----------------------------------

1) Copy the folder the DOWNGRADER/2.50/DOWNDATERTEST if you have 2.50
or DOWNGRADER/2.60/DOWNDATERTEST if you have 2.60 to /PSP/GAME/ in your memstick

2) Wait someone with 1.50 to pass you a folder called DOWNDATER and copy it to the root of your memstick.

3) Init gta and the eLoader

4) In the eLoader menu, choose the downdater test. WARNING: the program won't output any display and any warnings, it will init the downgrader process inmediatelly.

5) You'll see the your memstick flashing. That means that your psp is being flashed from the memstick.
You won't see any type of output in the screen (this is for safety). When the memstick finishes of flashing, WAIT at least a minute, and then reinit your psp by holding the power button.

6) That's all. If all went right, you'll have 1.50. If it went less good, you'll still have 2.50/2.60. If all went wrong, you'll have a bricked psp(except in the case you have the modchip) Remember that you have accepted that risk.

Technical details
------------------

This program performs the following operations.

- It loads the ipl_update.prx and lflash_fatfmt.prx from the 1.50 updater.

- It performs a logical format of the flash0 partition using the function
sceLflashFatfmtStartFatfm t found in the lflash_fatfmt.prx

- It writes a dump of the 1.50 flash0 to the flash0.

- It writes the Initial Program Loader (Ipl) using the functions sceIplUpdateClearIpl and sceIplUpdateSetIpl from the ipl_update.prx module. The ipl is embedded in that module.

Other considerations:
--------------------

- Users with TA-082 psp's shouldn try this. Also, it may be better that at the beginning, only users with a 2.50/2.60 NOT from factory (they updated from a below firmware) try this.

This looks promising, but like said, it is untested. I cannot post the source as it is a competing site, but MSN me and I will give it to you.

I also have the download link for this if anyone wants to try it, however, I WILL NOT be held responsibile for any damage that it causes.

EMAIL ME VIA THIS BOARD FOR LINKS.

-N

[mod:9a3c2f885e="F34R"]DO NOT USE THIS UNTIL FURTHER NOTICE !![/mod:9a3c2f885e]

jojo1980 · 06-28-2006, 01:26 PM

dark alex is a respected guy, but this sounds risky as hell to me.
doesnt really sound like alexs thing, maybe a fake like the one that attached themselves to fanjita?

Nitrus · 06-28-2006, 01:27 PM

Nah, Dark_Alex posted himself that he made it. Again I can provide links if you MSN me, im online for the next 10 mins.

-N

sum182oftheyear · 06-28-2006, 02:26 PM

I would not trust running that on my psp.

Kiechi · 06-28-2006, 04:47 PM

Well, if someone does try it. And it works. It'll be a breakthrough in the Homebrew gaming world.

Anyways, it seems promising but I for some stupid reason (Well.. Not so stupid.. I just don't seem to take my own advice) I upgraded. Bah.

Dirtwiz11 · 06-28-2006, 05:00 PM

I would test it but...... i have a 2.7 psp sorry

ace_012 · 06-28-2006, 05:01 PM

Coolness. Eh I don't take my own advice either and upgraded a few days ago too. And now all teh sudden all this pops up. Makes me mad too. O well I figured I would never get GTA LCS but yea. This sucks the big one. Nice for all the 2.5/2.6 users though. I hope someone with a few psp's try's it or something.

LOhateVE · 06-28-2006, 05:26 PM

cant you just emulate 2.5 with 1.5 now? when I quit runumd it takes me back to 2.5 until i restart the psp. Browser works wonder if the other stuff does.

F34R · 06-28-2006, 07:15 PM

[mod:ea320573c5="F34R"]DO NOT USE THIS. I've already bricked two psps working with this. Someone claims to have downgraded successfully, but I really doubt it. Another mod from QJ has already bricked his PSP as well. I repeat, DO NOT USE THIS !![/mod:ea320573c5]

F3nd3r_51 · 06-28-2006, 07:20 PM

Ouch F34R you really bricked two PSP's?? That sucks man.