E dopo l'uscita del primo modchip per PSP, con tutte le promesse fatte, tutte le pene subite, tutte le prove, i test e i sudori dei più grandi programmatori sulla scena PSP...ne esce vincitore Dark_Alex, il creatore del Loader
DAX ZISO e del PRIMO FIRMWARE CUSTOMIZZATO della storia della PSP. In realtà il suo non è un vero e proprio Firmware ma una sostituzione dei prx più importanti di esso per renderlo pieno di nuove funzionalità...di seguito il changelog:
Custom Firmware - The proof of concept by Dark_AleX
There has been lately some discussion about if custom firmware in the psp are posible (note: custom in the sense of writing our own executable code in the system, and not only data like fonts, videos,...)
Even a lot of developers doubt that this is possible due to the protections in the psp. Well, i'm here with this simple proof of concept to show the contrary 
Instructions:
(Note: this thing only works for 1.50)
- Copy the PSP folder to the root of your memstick.
- Execute the program "Custom Firmware - The proof of concept" It will write to the flash some executable files.
Now you are done.
This program has ben tested on my psp. However, as all programs that write to the flash, there is always some risk of bricking the psp. Use it at your own risk.
IMPORTANT (to avoid confussion): the program includes a file called vshmain.prx.
This file is NOT of Sony, it comes from me, the source of everything is released.
The features of this custom firmware - proof of concept are:
- Execution of normal pbp's (1.00 ones, no-kxploited)
- Posibility of hiding corrupt icons. (note: by default it's not enabled, look at the file /PSP/SYSTEM/config.txt to see how to enable it)
- Posibility of skipping the SCE logo at the startup
. (and in this way avoid the annoying auto-execution of the UMD). Like the previous one, this is not enabled by default.
- "Recovery mode:". If you keep R pressed while starting the psp, it will enter in "Recovery mode".
Recovery mode is not more than a simple application that will let you to use the usb, and execute a program under ms0:/PSP/GAME/UPDATE/EBOOT.PBP, that could be, for example, a sony updater or the 1.50 -> 1.00 downdater.
This would allow to recover potential bricks caused by the writing of bad fonts/videos/sounds... to the flash.
(Note that this wouldn't allow to recover critical things like the overwriting of critical prx's)
- Autoexecution of a program at the startup. See the configuration file at /PSP/SYSTEM/config.txt to see how to use it.
Waiting next custom ;)
In pratica l'ultima parte è la più interessante! La possibilità di sbrickare psp brickate (cioé che hanno problemi nell'esecuzione del FW) per mezzo di programmi che cambiano fonts o icone o gameboots come Xflash..purtroppo non sarà però possibile sbrickare PSP con prx critici danneggiati...per questo l'unica spiaggia è il chip ;)
Ovviamente il prx dentro il pack scaricabile non è di proprietà della Sony, dunque nessuna violazione del copyright, di seguito il link per il download ad un server esterno:
http://psprev.netsons.org/index.php?ind=downloads&op=download_file&ide=27&file=cf_proofofconcept.zip
Per scaricare bisogna registrarsi...speriamo in un breve upload sul server locale