The first version of the 1.0 firmware was only distributed in Japan. It was found an exploit to load homebrew, it would be quickly remedied by Sony in the next version. Access to the kernel was fairly comprehensive, allowing the hackers to work with more comfort on this version. However, the downgrade to download this version (only possible from a firmware 1.50) would be unnecessary for the average user, since the version 1.50 the 99 allowed uploading of firmware written for the console. Moreover it can not be assumed with certainty that all the PSP with firmware 1.50 or greater is native to function under the version 1.00.
Version 1.50 (firmware to the PSP native American and European) would be made famous by the exploit that allowed homebrew to load. Until the appearance of the first custom firmware (the 2.71 SE-A), is the only version on which you could run backups.
Later versions show 1.51 and 1.52, which corrected the security flaws that allowed homebrew to load from version 1.50.
2.00 From the menu there is a network with an internet browser (requires Wi-Fi) and the LocationFree player. You are allowed to save an image as the background (the image will reside in flash1: / and the PSP format BMP)
In the 2.01 version was corrected a bug that allowed to use an exploit in a TIFF image, which allowed us to believe that the PSP version was 1.00 and the “update” to 1.50, was one of the most famous downgraders.
In version 2.60 was introduced RSS feeds into the Red
In version 2.70 integrating the plug-in to display web pages with Flash, using the Internet browser. Either way, their inability to work with the latest versions of Flash, and the lack of power of the browser to load web pages with Flash content correctly, would make the update is not worthwhile.
In contrast, you can run 2.71 Homebrew (homemade programs) using an exploit. In this updated version came out when many of the LocoRoco demo, and at that moment was when they first got the PSP downgrade 2.50, so that many users of 2.71 PSPs were very frustrated.
Later, in the version 2.80 introduced new changes.
2.81 was corrected in a security breach, which allows the 2.80 load certain EBOOT. PBP unsigned and not 2.81. Also makes the PSP can recognize and work with Memory Stick PRO Duo, 4 and 8 gigabytes.
In version 3.0 introduced the ability to override the sometimes annoying autoarranque from UMD to make a restart of the console.
Are also options Camara, unit certificate, Using Distance Instruction manuals and online menus Photo, Game and Red respectively. It also implemented an emulator of the PlayStation video game classic, with those downloaded from a PlayStation 3 connected to the Internet with payment.
Now you can put videos in the folder ms0: / VIDEO / (where ms0: / is the path to the Memory Stick), MP4 format, with any name, and not just folders ms0: / MP ROOT/XXXMNV01 and ms0: / MP ROOT/XXXANV01 depending on whether they were encoded in AVC or MP4
In version 3.03, was added better compatibility with PSX games emulated.
In version 3.10, among other improvements, will fix the bug that allowed homebrew appeared to be at 3.03 and the previous version.
In the 3.11 version was corrected a bug that made the video game does not respond when using the R-Type game on firmware 3.10. In addition, some improvement has been added to the PlayStation emulator system, improving the compatibility.
At the end of March 2007 was released the firmware 3.30, with the advantages of being able to display thumbnails in the ‘RSS Channel, also supported in the Video folder, extended support for PlayStation Network games, as well as the possibility of changing the speed of the virtual disk to emulate games from the original PlayStation (normal or fast).
On April 19, 2007was launched by Sony firmware 3.40 with enhancements such as improved PlayStation Network games to highlight.
On May 31, 2007 was brought to light the firmware 3.50 and its main improvement is that you can connect a PSP to a PS3 through internet, and is implemented by a loader for official ISOs Sony. Today is the last version that allows programs to run home (homebrew) through an exploit.
On June 29, 2007 was released by Sony firmware 3.51 incorporates only a security patch to prevent possibly downgrade to exploit the game Lumines to be allowed to downgrade 3.50 to 1.50, and thus able to load homebrew and backup games from memory stick.
On July 24, 2007 launched the 3.52 firmware, which includes many security fixes, also brings updates to previous versions, another thing that brings it has expanded support for releases of PlayStation format software Network.
On September 6, with the launch of the new PlayStation Portable Slim and Lite, was put into operation the previous firmware from Sony, version 3.60.
On September 11, Sony released firmware 3.70 for the new PSP, due to the hack of the previous and new firmware.
On September 14 Sony released firmware 3.71, which improves some known incompatibilities with the regions of PSP, and implemented a new submenu, under the theme settings, which allows you to customize the icons and wallpaper.
Have brought back some new firmware, the 3.72 and 3.73, which improve sound quality and compatibility as well as integrate the ability to view photos and listen to music simultaneously.
The 3.80 firmware includes mainly the possibility of listening to Internet radio, plus new graphics for the songs.
The firmware version is 3.90, whose main novelty is the transmission of the VoIP program Skype in the American version and the Go! Messenger, enabling videoconferences through the chamber Toy.