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Personal Jukebox
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===Memory=== The PJB has 12 MB of [[DRAM]] and 1 MB of [[flash memory]]. The DRAM is used to buffer data (between 8 and 12 minutes of music, depending on the bitrate used for encoding) from the hard disk during playback. The buffer allows the disk to be run only intermittently, preserving battery life. When the hard-disk is stopped, battery life is preserved; the ramp-loaded heads also retract from the disk surface, helping to reduce the possibility of damage. The flash memory houses the firmware as well as the [[booting|bootstrap]].
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