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December 7, 2010 // 2:31 pm - Since the release of PS3 Firmware v3.55 there is no sense in keeping the master key a secret any more - it has been released, along with unencrypted payloads, and a promise to release the source-code by PS3YES for a free PSGrade PS3 downgrader.

Download: PSGrade / PSGrade PS3 Hex Codes / psgrade_teensy_at90usb1286_16.hex by littlebalup

Of note, the downgrade hex will only work on PS3's with a firmware of 3.50 or below.

The same team which brought the PSN spoof for online support of jailbreaks now has also brought us a Free Downgrade HEX for the PS3! PS3YES has released un-encrypted HEX files for downloading.

They promise open-source code to be release soon, but find below pre-compiled HEX files:

PSGRADE AT90USB646-16Mhz Teensy++ 1.0
PSGRADE AT90USB1286-16Mhz Teensy++ 2.0

This is the last line from psgrade_ps3yes.hex

[Register or Login to view code]

Of note, The master key has been stated to be:

[Register or Login to view code]

Furthermore: A PS3YES flash update and PS3 Downgrade guide have been posted here and PS3Key flashes have been posted here.

PS3YES has stated, to quote:

"Our downgrade firmware is based on the PSGrade project, we will open the source soon.

Support for the following:

PS3YES AT90USB162 8mhz
PS3YES AT90USB162 16mhz
AT90USBKEY at90usb1287 8mhz
Teensy++ 1.0 at90usb646 16mhz
Teensy++ 2.0 at90usb1286 16mhz

Remember PS3YES were the first to release that PSN Hack that lasted a week on their Chinese forums!

Also sadly v3.55 is out so you can only use this great release to Downgrade v3.50 or LOWER firmwares!

NOTE: Importing the HEX to other devices using current payload converters will NOT work!"

graf_chokolo says: The key from KaKaRoTo for 0xAAAA dongle id is fine Just tested it by communicating directly with USB Dongle Authenticator from GameOS through DM VUART. Congratulations KaKaRoTo Good work!

PSGRADE Free PS3 Downgrade Hex Released - Master Key Found!

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#91 - hawk188 - December 8, 2010 // 1:57 am
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Cheers BarbnJason - I can't wait to go home and try !!

#90 - hackerxide - December 8, 2010 // 1:52 am
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Quote Originally Posted by xScoper View Post
Any Ti 84 ports yet?

Atm no, we just have to be patient and wait for all this to sort out, like whether or not the key is the master key, or just a jig key.

But I do agree with you, i'm waiting for the tidal wave of ports to all existing boards

#89 - rip - December 8, 2010 // 1:44 am
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Here is the TEENSY 2.0 Board

#88 - barbnjason - December 8, 2010 // 1:37 am
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Yes thats the Idea on what to do to play the 3.50 games (from Orignal Disc) and enjoy JB stuff.

Also most reports are that:

Fat= Untouched.

Some think that has to do with the NAND on the FAT can store the whole fw and silm stores a part on the HDD.

#87 - FMAranda - December 8, 2010 // 1:36 am
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Can anyone please compile for PIC boards? I tried to use HEXTOOL but it says that there is no payload on these hexes.

#86 - barbnjason - December 8, 2010 // 1:34 am
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Try this one not sure if its still live but if it is this is the one you need.. from this post:

There is also a guide on how to use the files.

#85 - dyceast - December 8, 2010 // 1:33 am
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Look forward to using it Evilsperm when my board arrives...

#84 - evilsperm - December 8, 2010 // 1:30 am
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Ok all fixed up!

zAxis has pushed a fix in psgrade.c

I have now pushed it to my git with the updated lufa-lib.
I had cyberskunk test it out and everything is working perfectly now

git repo: git://

Fixed hex's:

Fixed Source:

#83 - hawk188 - December 8, 2010 // 1:28 am
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Sorry but I am utterly confused. Worked, don't worked, major issues.. etc.

Ok so I have a Minimus AT90USB162 and I have the other 3 files required and currently on v3.41. Can someone plesae tell meif this will work :

If I wanted to play GT5 , I would let the systems update to 3.50 then play the game and when done playing, downgrade it back to 3.41 using the method posted here ? So any game requiring 3.50 can be played this way ?

Will downgrading totally reformat the HDD ?

Many many tnhanks in advance

#82 - elser1 - December 8, 2010 // 1:28 am
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thanks mate.. nice explaination.. + rep