PlayStation Portable System Software is the official firmware for the PlayStation Portable. Updates add new functionality as well as security patches to prevent homebrew applications and plugins from being executed on the system. Updates can be obtained in four ways:Direct download to the PSP over Wi-Fi. This can be performed by choosing [Settings], [System Update] from the XMB.Download to a PC, then transfer to the PSP via a USB cable or Memory Stick.Included on the UMD of some games.
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