Updating psp through ps3
Sony realized that not many people were upgrading to 1.51/1.52, so they had to give them an incentive to to update. The USA release date for V2.00 was originally August 12, but it was delayed until August 24.
On the same day of the release of the US 2.00 firmware, Japan also had a silent firmware update, this update was the same as the US version, it is assumed that Sony had fixed a minor bug with the semi-update.
Various games also force a firmware update, one of which is Madden NFL 06.
When the PSP was released in Japan, all PSP units came with the very first firmware version, V1.00.
As of September 24, an exploit in libtiff has allowed people to execute unsigned code, using the Image Browser.
October 3rd, 2005 marked the release of the firmware V2.01, this firmware corrects the libtiff issue and thus does not allow the downgrading of the system or use of any homebrew applications.
Sony had promised to release a new firmware on July 27, 2006 and they delivered.
2.80 features a download function for downloading images using the RSS Channel, the ability to play AAC files in .3gp format and compatability for another demo.
When the PSP was launched in PAL regions, it included a Sampler UMD containing several game movies and demos as well as the V2.00 firmware.While no solid proof of it being anymore than a means to crash the PSP, it may be promising.Currently, no one is even sure if this is an exploit (in the form of a buffer overflow in libtiff, considering thats what firmware 2.01 was released to fix), but debate rages on.It will also not allow UMD discs to autoload on start up. MPH released a downgrader for people who no longer wish to use firmware 2.00.
The downgrader has a high success rate, and returns the PSP to the homebrew-friendly 1.50 firmware.Due to the previous firmwares being cracked, 2.80 also features new encryption.