PSP Chronoswitch Downgrader 7.0

Downgrader for PSP including latest Infinity 6.61 and OFW (eCFW) 6.61

  1. kozarovv
    Chronoswitch Downgrader

    [VERSION 7.0]
    -> Added support for Infinity

    [VERSION 6.1]
    -> Added support for 11g units to 6.60

    [VERSION 6]
    -> Added support for 6.61

    [VERSION 5]
    -> Added support for 09g units to 6.20

    [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?]
    6.20-6.35: 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.
    6.38/6.39: It uses my http_storage exploit to gain kernel access. Basically, http_storage has a vulnerability in it, where I can write -1 to anywhere in memory.
    6.60: Uses sceNetMPulldown to gain kernel access.
    6.61: same as 6.60 (only certloader kexploit is patched in 6.61)

    [I'm a dev, sup?]
    Source code included in package.

    Davee - legend. Originally made 6.35/6.31 downgrader
    some1 - legend. 6.38/6.39/6.60 support.
    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
    qwikrazor87 - 6.61/11g support.

    You run the application at your OWN risk. I am not help accountable if you PSP fucks up.

    [Open Source]
    Chronoswitch is open source! Get the source here:

    Follow me on twitter: @DaveeFTW
    Dyrn3006 and nickxfaster like this.