Chronoswitch Downgrader PSP

Chronoswitch Downgrader
General
Author	DaveeFTW, TheZett, Krazynez
Type	Utilities
Version	7.6
License	Mixed
Last Updated	2024/09/07
Links
Download
Website
Source

Chronoswitch is a firmware downgrader for the Playstation Portable (PSP).

Installation

Download and extract the latest version from the release page.

Copy the PSP folder from the extracted output to your Memory Stick. You will need the firmware update for version you wish to downgrade to.

If you want to downgrade to 6.20, you will need the 6.20 official update. If you're downgrading a PSPgo, make sure you download the official firmware appropriate for that device.

Copy the official firmware update to PSP/GAME/UPDATE/EBOOT.PBP on your Memory Stick. If you're using a PSPgo, make sure this copied to the internal storage instead.

The downgrader is "signed", and can be launched without having a custom firmware installed. Once you run the application, follow the on-screen instructions.

Screenshots

Media

How to Downgrade Your Custom Firmware From 6.61 to 6.60 Using Chronoswitch 7.0 (Denver Gamer)

Changelog

Version 7.6 (krazynez)

• Changed default color.
• Detect OFW to be run from proper device (i.e You can only run X000 Series OFW on non GO models and vice versa).

Version 7.5 (krazynez)

• Updated Tools to encrypt EBOOT to use python instead of having mixed OS steps.
• Bug Fix: GO had issue running with just Infinity/OFW running. ( Thanks TK for testing )

Version 7.4 (krazynez)

• PSP GO cleanup.
• If EBOOT.PBP is not found in PSP/GAME/UPDATE/ will let user know it is not found.

Version 7.3 (krazynez)

• GO can have UPDATE on ef0 (Internal Storage)/ ms0 (Memory stick).

Version 7.2 (TheZett)

• Replaced 'factory firmware limitation', which prevented certain PSPs from being downgradable at all or limited them from being downgraded to certain firmwares they theoretically support.
• This fixes most cases where an IDXFFFFFFFF or CAAFFFFFCF7 error could appear.
• Chronoswitch now detects your PSP's motherboard alongside its model and allows flashing all firmwares (5.00+) that are supported by it.
• Removed support for downgrading 09g units below 6.30.

Version 7.1 (TheZett)

• Added experimental support for 07g units on 6.6x.

Version 7.0 (DaveeFTW)

• Added support for Infinity.

Version 6.1 (DaveeFTW)

• Added support for downgrading 11g units to 6.60.

Version 6.0 (DaveeFTW)

• Added support for 6.61.

Version 5.0 (DaveeFTW)

• Added support for downgrading 09g units to 6.20.

Credits

Thanks to:

• some1
• bbtgp
• coyotebean
• kgsws
• Silverspring
• Bubbletune
• qwikrazor87

External links

• Author's website (DaveeFTW) - https://lolhax.org/2011/09/01/chronoswitch-downgrader-5-0-advanced-09g-support/
• GitHub (DaveeFTW) - https://github.com/DaveeFTW/Chronoswitch
• GitHub (TheZett) - https://github.com/TheZett/Chronoswitch
• GitHub (krazynez) - https://github.com/krazynez/Chronoswitch