Modern Downgraders

Table of Contents Pandora's Battery Downgrading your PSP From 6.xx to 6.20 From 6.xx to 5.xx From 1.50 to 1.00 Running Old Firmware 6.xx 2.xx - 5.xx 1.xx To-Do Repair Semi-Brick on PSP-3000 Brite and PSP Go Sources

Pandora's Battery

• Despretar del Cementerio v9 - An update to Dark AleX's original made by neur0n, supporting 6.60 ME.
• Time Machine - Install multiple firmwares to your memory stick, and use the Pandora's Battery to switch between them.
  • Time Machine Addon - A modification by neur0n supporting 6.60 ME.

Downgrading your PSP

From 6.xx to 6.20

• 6.xx Downgrader - Downgrade from any 6.xx firmware. Not for PSP Brite (09g) models.
• Chronoswitch Downgrader - A unique 6.xx downgrader designed for PSP Brite (09g) models, to install 6.20.

From 6.xx to 5.xx

• Hellcat's Recovery Flasher

From 1.50 to 1.00

• 1.00 Downgrader - Downgrade from OFW 1.50 to OFW 1.00, the first firmware available for the PSP in Japan.

Running Old Firmware

WARNING: Your PSP will be BRICKED if you downgrade past your PSP's lowest firmware version. See PSP/Models/the chart to see which

If you're a historian who wants to try out older firmware, we recommend obtaining a PSP 1000 Fat, since is able to run every single firmware version safely.

6.xx

• 6.xx Downgrader - Downgrade from any 6.xx firmware. Not for PSP Brite (09g) models.
• Chronoswitch Downgrader - A unique 6.xx downgrader designed for PSP Brite (09g) models, to install 6.20.
• Hellcat's Recovery Flasher - Directly jump from 6.xx to older versions.

2.xx - 5.xx

• Time Machine - Install multiple firmwares to your memory stick, and use the Pandora's Battery to switch between them.

1.xx

• 1.00 Downgrader - Downgrade from OFW 1.50 to OFW 1.00, the first firmware available for the PSP in Japan.

To-Do

• Create a unified Time Machine app that installs any firmware to PSP
• Create a version of RainsMMSMaker that works with 6.60 CFW

Repair Semi-Brick on PSP-3000 Brite and PSP Go

Semi-Brick is a state where the firmware no longer functions, but the recovery menu is still accessible by booting with the R trigger held.

This occurs on PSP-3000 Brite and PSP Go as a result of a bad flash while installing 6.20 PRO permapatch.

Make sure that your unique vshorig.prx file is on the root of the memory stick; you'll need this to uninstall 6.20 PRO. Hopefully you've backed it up.

1. remove battery, re-insert and power up holding R trigger.
2. if the PRO recovery menu shows up, you're in luck else you have a full-brick.
3. in the recovery menu, search for this option 'Hide cfw files' and set it to DISABLED
4. Choose 1st option -Toggle USB (make sure USB device set to ms)
5. make sure you have a 'vshorig.prx' file there (if you haven't tampered with the cfw files it should be there and you can skip step 3 and 5)
6. Download Semi-BrickRecovery.exe.
7. copy that file in this location ms0:/psp/game
8. now run the Semi-BrickRecovery.exe from this folder.
9. Done!
10. Go to the UPDATE folder and replace the 635.pbp with the 6.60 OFW EBOOT. Make sure to rename the 6.60 eboot to ofw.pbp .
11. if you have any plugins in the seplugin folder delete all of them now.
12. exit usb mode and choose to reset device.
13. power on again holding R trigger.
14. run the third option 'Run /PSP/GAME/RECOVERY/EBOOT.PBP'
15. press X to install ofw.
16. the Sony updater should now come up.
17. You're now back on 6.60 OFW. We recommend that you install Temporary CFW instead of a permapatch, since there is no chance of semi-bricking your PSP.

Sources

• PSPMod - The Ultimate PSP Guide