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Pandora
On August 22, 2007, Team C+D released the "Pandora's Battery" that can convert a spare Memory Stick Pro Duo and battery into a "Magic Memory Stick" and a "JigKick Battery". The Memory Stick and the JigKick battery couple is called "Pandora's Battery". The Memory Stick and battery can then be used to downgrade any PSP of any version or to recover from a brick. To convert the Memory Stick and battery another PSP which is able to run 1.50 homebrew is needed. After the downgrade/unbrick service has been completed, the Memory Stick and battery can be restored for normal usage.
A "JigKick Battery" is a battery with the first address in the EEPROM chip changed to 0xFFFFFFFF. This unlocks the service mode of the PSP and launches the IPL from the Memory Stick (instead of from flash0). A "Magic Memory Stick" consists of a reverse-engineered IPL and a minimal subset of the firmware 1.50 stored on a Memory Stick Pro Duo. This downgrader can downgrade all firmware versions. The original version is incompatible with the PSP Slim & Lite due to the 1.50 IPL being incompatible with PSP Slim & Lite hardware. However, on September 28, 2007, a version that works on both the old style PSP and the Slim & Lite was released. The new debricker is called Despertar del Cementerio, and is also known as the Universal Unbricker, which was developed by Dark_Alex. Instead of installing firmware version 1.50, it installs a custom firmware. The current version of Despertar del Cemneterio is v5.
Though Sony advocates against use of any homebrew, representatives have said that the Pandora's Battery will not physically harm the PSP in any manner, as this is the same method used by Sony when customers send in their bricked PSPs for repair.
U(niversal) P(andora) M(emory) S(tick)
The UPMS Project is a Homebrew project designed to put all the tool's and software required to downgrade and unbrick any PSP both Phat (Original) and Slim/Lite (New Model). To create the UPMS you require a CFW running PSP aswell as at least a 512mb memory stick (Max 2GB). To find out more information on how to create and use the UPMS check out our Tutorials section.
Current members of the Project are:
OverfiendX-UPMS Creator/Tester
gh0st-UPMS/Ultimate Loader Developer/Tester
Lawthugg-UPMS Co-Designer/Tester
blueacidic-U.P.M.S. Web Site Developer.
UPMS is in it's 4th revision and contains the latest version of Despertar del Cemneterio (v5).