En/Downgrading the PSP firmware (2.00 to 1.50)

PSPWiki

by Tdubel, 16 January 2006.

Sisällysluettelo 1 Requires 1.1 2.00 firmware 1.2 Files 2 Copying files 3 Downgrading 3.1 overflow.tif 3.2 PSP Update ver 1.50 3.3 Settings

Requires

2.00 firmware

You need the PlayStation Portable with 2.00 version firmware. If the firmware version is 1.51 or 1.52, you need to update it to the 2.00 version.

Files

• EBOOT_1.50.zip (contain EBOOT.PBP)
• MPHDowngrader.zip (contain downgrader.txt, h.bin, index.dat, overflow.tif)

You can download these files from the PSP Updates.

Copying files

Extract the EBOOT_1.50.zip and MPHDowngrader.zip.

Create a UPDATE folder in the \PSP\GAME folder of your memory stick and copy EBOOT.PBP to it.

http://www.tdubel.com/psp/kuvat/fw200150/eboot.png

Copy overflow.tif in the \PSP\PHOTO folder.

http://www.tdubel.com/psp/kuvat/fw200150/overflow.png

Copy h.bin and index.bat in the root of the memory stick.

http://www.tdubel.com/psp/kuvat/fw200150/index.png

Downgrading

overflow.tif

Plug the AC adaptor in the PSP. Choose the PHOTO icon at the PSP menu. This will launch version changer; the screen goes black and there will be some white characters on the screen.

http://www.tdubel.com/psp/kuvat/fw200150/numbers.png

Wait at least 30 seconds and restart the PSP (hold the power button as long as necessary). After that there should be a file named "index.dat.bak" on the memory stick.

PSP Update ver 1.50

Go to the Game menu ja choose the Memory Stick.

http://www.tdubel.com/psp/kuvat/fw200150/menu.jpg

Launch the "PSP Update ver 1.50".

http://www.tdubel.com/psp/kuvat/fw200150/update150.jpg

Follow the installing instructions.

http://www.tdubel.com/psp/kuvat/fw200150/0percent.jpg

http://www.tdubel.com/psp/kuvat/fw200150/46percent.jpg

When the update reached 99 percent, the following error message appeared on the screen:

http://www.tdubel.com/psp/kuvat/fw200150/failed.jpg

Restart the PSP (hold the power button as long as necessary). You will get another error message: "Settings information is corrupted. Press the O button to repair and restore default settings". Press the O button to continue. The PSP should rebooted.

Settings

After the downgrade you have to set the language, time and nickname again.

http://www.tdubel.com/psp/kuvat/fw200150/isetup.jpg

Now your firmware version should be 1.50.