Potential 2.6 downgrade - PSP3D.com - Sony PlayStation Portable News, Homebrew, Hacks, Reviews, Videos, Mods, Forums

dark_eternal_x · #1 (**permalink**) 01-05-2006, 01:58 PM

Hello, I will first off state, I am a noob. Don't discredit what I have to say here, this could be of some valuable insight. I have worked with DOS, pocket pc, and windows operating systems and various files and have come to the conclusion that the psp is the same as any other system. It can be hacked. I'm looking at version 2.6 since that is what I have. Here is my theroy, you're welcome to either prove it works, or prove me wrong.

I'm using PBP Unpacker v0.94 to extract the files. I'm suggesting this as a downgrade, or a global rewrite of the system core. I also use a hex editor to see alot of characters. In the psp system istelf, it uses 24bit-bitmaps for the backgrounds. I haven't done this yet, but compare the 1.5 or 1.0 version of the EBOOT.PBP file, with the EBOOT.PBP of 2.6.

The characters I see are the same as opening a picture file in dos edit or under windows notepad. I say seperate where the bitmaps start and end at, then look at the rest of the files. The icon file ICON0.PNG is irrelevant so disregard it. Next, look at the PARAM.SFO file. I'm not a programmer by any means, but if you need to modify the boot parameters naturally this is where you go, if that is even necessary. Then, look at the DATA.PSP and DATA.PSAR files. One of those will have the bitmap pictures in it.

The reason I talk about this is because once that code is isolated, it can either be modified, or left as is so you can see what the rest of the coding parameters are. This way, possibly, if my theroy is correct, it is the additional software that Sony is incorporating that is preventing downgrading, and homebrew from running. If we could isolate the coding for each individual program say the internet browser and rss and location free, we could then determine wether we could just replace those programs with emulators say for the NES or SNES or whatever a person prefers.

Yes, this would void the piss out of the warranty, but big deal. If we could just rewrite the values for the programs and see the base structure for 2.6 or 2.5, then Sony could never come up with an update that would prevent apps and homebrew because we could just code the entire operating and instruction system ourselves. If anyone with any experience with coding, hacking, or just sits in their parents basement that has any drop of computer talent that is willing to try this, then please email me at divine_angel_x@yahoo.com

Simply write an entire EBOOT.PBP file by comparing two different ones. One that allows for homebrew (1.0 or 1.5) and one that doesn't (2.5 or 2.6)

Thanks for hearing me out.

Dark Eternal X

xlxmarkxlx · #2 (**permalink**) 01-05-2006, 02:05 PM

wow man your smart maybe you should get a hold of fanjita and work with him

KyleNic · #3 (**permalink**) 01-05-2006, 02:06 PM

Quote:

Originally Posted by dark_eternal_x

Simply write an entire EBOOT.PBP file by comparing two different ones. One that allows for homebrew (1.0 or 1.5) and one that doesn't (2.5 or 2.6)

Im no hacker/coder but i even know is pretty damn hard to rewrite an eboot if not impossible. I can assure you its no simple job. If it were we wouldnt have the problems we do now.

BloodWave · #4 (**permalink**) 01-05-2006, 02:11 PM

Just impossible i think Sony as thought about exploit possibilities like this and set some protections against them
If we want to downgrade i think we must think about something very more difficult...but what...lol no idea

videogamer2791 · #5 (**permalink**) 01-05-2006, 02:13 PM

hey man that was brilliant

dont call your self a noob though
alot of people here cant understand a word your saying, but i hear ya

sinanohneh · #6 (**permalink**) 01-05-2006, 02:16 PM

is hier ein deutscher der mir das besser übersetzen kann als google?

oder bist du divine_angel_x@yahoo.com ein deutscher?

dark_eternal_x · #7 (**permalink**) 01-05-2006, 02:17 PM

It's not impossible, I think it's just that no one has the patience to sit down and look through 18MB of raw data to see what could be edited and what could be safely modified. I'm willing to create a version 2.X EBOOT.PBP file, if anyone is willing to help me tear it apart and slap it back together.

And I doubt I'm smart enough to be of assistance to fanjita. I'm not a hacker, I'm jut a guy that worked with pocket pcs reflashing them and learning from costly mistakes. I bricked the iPaq h3635 model. I also found out how to bring it back using only windows xp and a perfectly timed update sync. Exactly 31.2 seconds of it being off the usb crade while updating then slapping it back in from the parrot loader screen. It works everytime.

Anyways, that os was hacked and recompiled by others on the net. That was 16 MB. a 2 MB difference isn't that big compared to it.

comwiz72 · #8 (**permalink**) 01-05-2006, 02:22 PM

nice idea, but take it from someone with experience in programming, this is not possible as Sony has encrypted the hell out of the EBOOTs to prevent just this.

This idea has been suggested before, and in fact, I think some people have made "custom" firmwares, but they only work on -2.0FW PSPs.

sinanohneh · #9 (**permalink**) 01-05-2006, 02:22 PM

hey

can you speak german?

what is your problem now??

what can't you do alone?

what have we to help?

sinanohneh · #10 (**permalink**) 01-05-2006, 02:26 PM

hey
i've a friend who is an IT-specialist its his job....

could he have an idea?