page_title: PlayStation Portable
section_title: Homebrew development and custom firmware
hierarchical_section_title: PlayStation Portable / Homebrew development and custom firmware
caption_attribution_description: PSPで実行されているHomebrewの画像
context_page_description: The PlayStation Portable is a handheld game console developed and marketed by Sony Computer Entertainment. It was first released in Japan on December 12, 2004, in North America on March 24, 2005, and in PAL regions on September 1, 2005, and is the first handheld installment in the PlayStation line of consoles. As a seventh generation console, the PSP primarily competed with the Nintendo DS.
  Development of the PSP was announced during E3 2003, and the console was unveiled at a Sony press conference on May 11, 2004. The system was the most powerful portable console when it was introduced, and was the first real competitor of Nintendo's handheld consoles after many challengers, such as Nokia's N-Gage, had failed. The PSP's advanced graphics capabilities made it a popular mobile entertainment device, which could connect to the PlayStation 2 and PlayStation 3 consoles, any computer with USB interface, other PSP systems, and the Internet. The PSP is the only handheld console to use an optical disc format – Universal Media Disc – as its primary storage medium.
  The PSP was received positively by critics, and sold over 80 million units during its ten-year lifetime.
context_section_description: On June 15, 2005, hackers disassembled the code of the PSP and distributed it online. Initially the modified PSP allowed users to run custom code and a limited amount of protected software, including custom-made PSP applications such as a calculator or file manager. Sony responded to this by repeatedly upgrading the software. Some users were able to unlock the firmware to allow them to run more custom content and DRM-restricted software. Hackers were able to run protected software on the PSP through the creation of ISO loaders that could load copies of UMD games from a memory stick. Custom firmware including the M33 Custom Firmware, Minimum Edition (ME/LME) CFWm, and PRO CFWl were commonly seen in PSP systems.
  Also, there was an unsigned program made for the PSP, which allowed the handheld to downgrade its firmware to previous versions.
caption: PSP-Homebrew
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