Apparently, a person sent a bricked PSP to Sony. The PSP was returned with a memory stick inside with the following files:
* Binary encrypted full NAND image.
* Required modules for system control for use by IPL of debug hardware.
* Logging module for debug log review (log is saved after full write).
* A file used for testing that the system plays well (usually a demo of a PSP game).
According to nicodemus82, the said memory stick is useless without a special battery that internet hamsters dubbed the "Sony JigKick" (After researching a bit, we found that the jigkick is actually a "special" move that targets a certain place). Reportedly, the battery accesses the third battery pin that "enables writing to the IPL from the memory stick". Here are the JigKick's specs:
* 1.1v-3.5v debug unit for connecting through the serial port in 3rd. battery pin.
* Transmission of data is UNENCRYPTED but uses a XOR algorithm for transmission (easily parsed and analyzed).
* Contains any number of IPLs (different ones for each motherboard revision (TA-XXX))
* IPL is loaded into the Kernel Memory. ME area seems most likely (IPL of the PSP is the same but missing 2 essential modules that the debug unit has).
* Contains ipl_mg_modules.bin and ipl_mg_nanddriver.bin
* IPL is encrypted in 3 stages. Easily decrypted to show stages, but not for decrypt each individual stage.
* Contains a 40x120 column TFT screen for display.
* Has a SERIAL port for PC connectivity.
* Seems to have a 32MB ROM IMAGE on Flash.
* 8MB of RAM.
* Nickel-Cadmium Battery Cell (possibly 76 hour battery life).
* AC/DC adapter port 15V.
* Contains 4 buttons (on/off, reset, connect/disconnect, menu).
* Arrow keys UP and DOWN for menu.
pictures the the battery have been leeked