Help the PSP 3D community grow!
Vote for us below:
| | Homebrew/Hacking - Discuss the latest available homebrew applications and games. |
Welcome to PSP3D.com - Sony PlayStation Portable News, Homebrew, Hacks, Reviews, Videos, Mods, Forums!
You are currently viewing our website as a guest, which gives you limited access to reply and interact to discussions and other members. By joining our free community, you will be able to post topics in the forums, communicate privately with other members, vote in polls, and access many other special features.
Registration is fast, simple, and absolutely free so join our community today!
|
 | | 
05-24-2006, 09:47 PM
| | | | My sincerest apologies to all of you. I was not able to do this, it is impossible, well at least from what I have tried.
What most of you probably think, which was what I thought also, is that all one would have to do is backup a 1.0 firmware from the NAND or JTAG, then flash and program it to a 2.6 PSP. In theory this would work, but here's the problem. Sony has even safe-proofed that. There is a bootstrap-like chip that when you update your PSP, it updates that chip as well, which tells the PSP what firmware to expect to load from the NAND. If the NAND is altered w/o this chip, guess what, it's a no-go...
Boundary scanning would work if you knew where to start and where to end and if Sony had released their flashing software, but since we do not have any information about the boundaries, JTAG is impossible.
Sorry again, guys, please don't be upset with me, I honestly tried, and it wasn’t enough, so I am now moving on and learning more about software programming for the PSP and Xbox. |
05-24-2006, 10:03 PM
|  | Jesus is in the building
My Mood:  | | Join Date: Nov 2005 Location: Carle Place..yea its 1 sq mile but so what!!! Age: 19
Posts: 1,072
Points: 13.56 Donate | | | I was hoping that wouldnt be the case.... |
05-24-2006, 11:54 PM
|  | Senior Member | | Join Date: Dec 2005 Location: Australia
Posts: 1,771
Points: 1.36 Donate | | | yep, this is what everyone said etc etc
ah well, good thing u re-tried what people'd already tried to re-confirm what they already confirmed etc
hope ur site got lots of hits
__________________ PSP 2.01 Owner
PSP 1.5 Owner
Hombrew Guide, All Versions - Here
MPH Gameloader Guide - Here
Firmware Dump Guide - Here
2.0 Games on 1.5 Guide - Here
2.01 & Above Downdgrade - Here |
05-25-2006, 01:46 AM
|  | Senior Member
My Mood:  | | Join Date: Feb 2006 Location: New Zealand Age: 17
Posts: 265
Points: 4.72 Donate | | | wasnt their the idea that the psp had a diagnostic mode (like ipods) when the battery voltage was altered?
__________________  PSP FW 1.5/2.00
2gb Memory Stick,WIFI  |
05-25-2006, 01:56 AM
| | | | Ours? If so, the no, our idea was to jack into the diagnostic bus, much like how Xbox modchips work. |
05-25-2006, 03:41 AM
| | | Senior Member
My Mood: | | Join Date: Feb 2006 Location: New Zealand Age: 17
Posts: 265
Points: 4.72 Donate | | | nah some were else, search for it, people said it could be done.
__________________ PSP FW 1.5/2.00
2gb Memory Stick,WIFI |
05-25-2006, 04:37 AM
|  | Junior Member | | Join Date: May 2006 Location: Italy Age: 27 | | 
Quote: |
Originally Posted by traviss My sincerest apologies to all of you. I was not able to do this, it is impossible, well at least from what I have tried.
What most of you probably think, which was what I thought also, is that all one would have to do is backup a 1.0 firmware from the NAND or JTAG, then flash and program it to a 2.6 PSP. In theory this would work, but here's the problem. Sony has even safe-proofed that. There is a bootstrap-like chip that when you update your PSP, it updates that chip as well, which tells the PSP what firmware to expect to load from the NAND. If the NAND is altered w/o this chip, guess what, it's a no-go...
Boundary scanning would work if you knew where to start and where to end and if Sony had released their flashing software, but since we do not have any information about the boundaries, JTAG is impossible.
Sorry again, guys, please don't be upset with me, I honestly tried, and it wasn’t enough, so I am now moving on and learning more about software programming for the PSP and Xbox. | Why has somebody to be upset with you? I think that the entire PSP community is grateful for the work you dedicated on that project!
From what you said above I still see the possibility to unbrick a PSP using its own firmware dump... Is that possible?
If the answer is yes an altered version of its own firmware can be put back to open a backdoor to start eboots without sign checking (like in firmware 1.00)... That could lead to many bricks but since there is the possibility of unbricking... I don't think that the PSP hardware have the time to check the entire firmware on startup... maybe it's only a version checking or checks only some files (otherwise 2.00 downgrader couldn't work either, since the firmware is altered by changing its version number)...
...that's only speculation...
Last edited by Gourry : 05-25-2006 at 04:40 AM.
|
05-25-2006, 05:40 AM
| | | | hi, just a question, since this checker has to change on every upgrade, can't it be flashed as well along with the nand to match? |
05-25-2006, 05:45 AM
|  | Master-Bator | | Join Date: Jan 2006 Location: England Age: 18
Posts: 957
Points: 16.97 Donate | | | we shouldn't be looking at a downgrader we should be looking at a mod-chip. I heard that if a voltage was sent to one of the legs on the nand chip (I was told this is what allows sonys code to run. So if a mod-chip was created that passed a voltage through this leg on the nand chip then it would not matter what firmware you have you could still run homebrew from the menu. Imagine 2.7 with the capabilities of 1.0 that would be very nice. But if a mod-chip was made it would have to be very thin (making it delicate and easy to snap). |
05-25-2006, 05:48 AM
|  | Member | | Join Date: Jan 2006 Location: Russia/Murmansk Age: 22 | | About 2.5 and 2.6 downgrading. Quote:
in new ver PSP (FW 2.50/2.60 from factory)
it use new "protection"
maybe w/ new bootloader ?
so it can not use old ver FW
if you paste old ver FW in it
it will not boot
new ver PSP (FW 2.50/2.60 from factory)
it just can Upgrade
and can not Downgrade !!
| http://forums.ps2dev.org
So we can forget about 2.5 and 2.6 downgraders if PSP was originally with them.
__________________ PSP VP v2.01 32Mb MS Duo | |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | | | Thread Tools | | | | Display Modes |  Linear Mode | 
Posting Rules
| You may not post new threads You may not post replies You may not post attachments You may not edit your posts
HTML code is Off
Points Per Thread View: 0.00 Points Per Thread: 1.00 Points Per Reply: 0.10 | | | | |
