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iPod Classic Generations
3rd Gen Thinner than the previous models, the third generation models replaced the FireWire port with a new Dock Connector.
4th Gen Apple replaced the touch wheel from the third generation iPod with the Click Wheel from the iPod Mini, putting the four auxiliary buttons underneath a touch-sensitive scroll wheel.
5th Gen The fifth generation iPod featured a 2.5" 320x240 QVGA screen and a smaller Click Wheel. It was also known as the iPod Video and it was the first iPod to be able to play videos.
6th Gen The front plate of the iPod is now made of anodized aluminum instead of polycarbonate plastic, and "Signature iPod White" has been replaced by silver.
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Apple iPod Classic
The iPod Classic (trademarked, marketed, and stylized as iPod classic and known before its sixth generation as simply iPod) is a portable
media player marketed by Apple Inc. The current generation is by far the most capacious iPod, with 160GB of storage.
To date, there have been six generations of the iPod, as well as a spin-off (the iPod Photo) that was later re-integrated into the main
iPod line. (Some sources refer to the revisions of the sixth generation as a separate "seventh generation.") All generations use a 1.8-
inch (46 mm) hard drive for storage. The "classic" suffix was introduced with the introduction of the sixth-generation iPod on September 5,
2007; prior to this, all iPod models were simply referred to as iPods. It is available in silver or black replacing the "signature iPod white".
The iPod's operating system is stored on its dedicated storage medium. An additional NOR flash ROM chip (either 1 MB or 512 KB) contains
a bootloader program that tells the device to load its OS from the storage medium. Each iPod also has 32 MB of RAM, although the 60 and 80
GB fifth generation, and the sixth generation models have 64 MB. A portion of the RAM is used to hold the iPod OS loaded from firmware, but
the majority of it serves to cache songs from the storage medium. For example, an iPod could spin its hard disk up once and copy approximately
30 MB of upcoming songs into RAM, thus saving power by not requiring the drive to spin up for each song. Custom firmware has also been developed
such as Rockbox (up to 6G - 6G requires emCORE) and iPodLinux (up to 5G) which offer open-source alternatives to the standard firmware and operating system.
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iPod Classic 3G
iPod Classic 4G
iPod Classic 5G
iPod Classic 6G
