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 Post subject: 6.38/6.35/6.31 -> 6.20 Downgrader By Some1
PostPosted: Mon May 23, 2011 4:02 am 
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You run the application at your OWN risk. I am not help accountable if your PSP get's BRICK

Has been tested on 1k, 2k, 3k, and Go

Quote:
[What does it do?]
Allows users who are incontent with their firmware to downgrade to 6.20 using the Sony Updater.

[How do I use it?]
Copy the "PSP" folder to your PSP. The downgrader is "signed" and can be launched from OFW XMB. You need to copy the 6.20 update to PSP/GAME/UPDATE/EBOOT.PBP and for PSPgo it must be the eflash it is placed on. After setup run the downgrader and follow the onscreen instructions.

[What does it technically do?]
It uses the utility/power exploit to gain kernel access and reboots into the updater with a special PRX running. This PRX uses the pspdecrypt functionality to decrypt the updater PRX when needed. This allows the updater to boot in the newer firmwares.
6.38: *add when source is released*

[Credits]
Davee - legend. Originally made 6.35/6.31 downgrader
bbtgp - legend. Continued updates to psardumper (pspdecrypt) and the signing application "prxEncrypter".
coyotebean - legend. Coninuted updates to psardumper (pspdecrypt) and large influence and research regarding cryptographics.
kgsws - legend. First application signed and method released.
Silverspring - legend. Lots and lots of info on KIRK where we'd still be in the dark without.
Bubbletune - BTCNF injection code and bits and bobs here ;D


Quote:
Another important note: After you downgrade to 6.20, you will get a BSOD (saying that your system information is corrupted), this is OK, just click circle to reset your system information and you will be back to normal.


6.38 Downgrader:
http://www.megaupload.com/?d=0VBRZ8ZN New version added support for 07g and 09g

6.20 PSP OFW:
http://www.mediafire.com/?6gwhtdfgzif6jfl

6.20 PSP GO OFW:
http://www.mediafire.com/?npjl15poj9ll1p9

Source:
http://wololo.net/talk/viewtopic.php?f= ... 03&start=0

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Last edited by Geo on Mon May 23, 2011 12:21 pm, edited 3 times in total.

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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Davee
PostPosted: Mon May 23, 2011 4:10 am 
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195

is it ok if i add this info the other davee downgrader topic? i credit you fully :D

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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Davee
PostPosted: Mon May 23, 2011 4:12 am 
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Ace_ExE wrote:
is it ok if i add this info the other davee downgrader topic? i credit you fully :D

Ok sure....


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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Davee
PostPosted: Mon May 23, 2011 5:30 am 
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195

we are still gonna keep this topic of course.... but should it get lost, the info you have here, will be in the stickied downgrader topic :D


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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Davee
PostPosted: Mon May 23, 2011 12:06 pm 
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UPDATED!


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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Davee
PostPosted: Mon May 23, 2011 12:19 pm 
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Ugh finally someone posted it. But 6.38 downgrader was made by Some1 not Davee.

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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Davee
PostPosted: Mon May 23, 2011 12:21 pm 
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Zeroneo wrote:
Ugh finally someone posted it. But 6.38 downgrader was made by Some1 not Davee.

Ok thanks Zero i edited it :D


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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Some1
PostPosted: Mon May 23, 2011 12:39 pm 
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19

good find. now i can downgrade my cousins pspgo. rep+

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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Some1
PostPosted: Mon May 23, 2011 12:40 pm 
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MGSPW

19

Does this downgrade 6.37 also?

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 Post subject: Re: 6.38/6.35/6.31 -> 6.20 Downgrader By Some1
PostPosted: Mon May 23, 2011 1:08 pm 
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19

rikimarukun wrote:
Does this downgrade 6.37 also?

not sure. but to make it easier for everyone, you should upgrade to 6.38 then use this to downgrade it.


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