PSP:Chronoswitch

Chronoswitch

Information
Author	DaveeFTW (Original) The Zett (v7.1 and v7.2) krazynez (v7.3 onwards)
Type	PSP Firmware Downgrader/Reinstaller
Version	v7.4
License	Open
Links
Website	N/A
Source	https://github.com/krazynez/Chronoswitch/
Download(s)	https://github.com/krazynez/Chronoswitch/releases/latest

Chronoswitch is a homebrew PSP utility that allows a console to freely upgrade and downgrade official PSP firmware. It is mainly useful for reverting a cIPL or Infinity console with PRO/ME CFW to OFW for installing cIPL ARK-4, or downgrading fron 6.61 to 6.60.

The following guide has instructions courtacy of the pspunk.

Prequsites

• Having at least 80% battery life
• Fully secured battery that will not fall out
• Ideally, a charger plugged into the system
• A 6.20 or newer firmware PBP. Anything older instead requires a compatible PSP with a JigKick & Magic Memory Stick.

Usage

1. Download the latest build of Chronoswitch.
2. Get the desired firmware update for your PSP. They can be reached from the following places:
   • Sony CDN
   • Darthsternie's archive
   • Midnightchannel archive
3. Transfer Chronoswitch's EBOOT.PBP file in the file path of ms0:/PSP/GAME/Chronoswitch/EBOOT.PBP on the console's memory stick, with ms0:/ being the root directory.
   • If using the PSP Go's internal storage, ms0:/ instead becomes ef0:/.
4. Transfer the firmware update file to ms0:/PSP/GAME/UPDATE/EBOOT.PBP on the console's memory stick, with ms0:/ being the root directory.
   • If using the PSP Go's internal storage, ms0:/ instead becomes ef0:/
   • If your update file is named something like 6.61.PBP, then rename it to EBOOT.PBP
5. Launch the Chronoswitch application and follow the on-screen instructions. Once completed, the PSP will restart and will now be on the official firmware version that was chosen.