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Linux distribution From Wikipedia, the free encyclopedia
iPodLinux is a μClinux-based Linux distribution designed specifically to run on Apple Inc.'s iPod. When the iPodLinux kernel is booted it takes the place of Apple's iPod operating system and automatically loads Podzilla, an alternative GUI and launcher for a number of additional included programs such as a video player, an image viewer, a command line shell, games, emulators for video game consoles, programming demos, and other experimental or occasionally unfinished software.
 | This article needs additional citations for verification. (April 2014) |
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 MandelPod, a Mandelbrot set running in iPodLinux | |
| Written in | C, assembly language |
|---|---|
| OS family | Linux (Unix-like) |
| Latest release | 2.3 (x86) / January 7, 2007 |
| Repository | |
| Platforms | see Compatibility |
| Kernel type | Monolithic (modified μClinux) |
| Userland | uClibc, BusyBox |
| License | GNU GPLv2+ |
| Official website | www |
The project has been inactive since 2009, but its website is still online. Further development of free and open source software for iPods have continued with the Rockbox Project, zeroslackr, and freemyipod, which have largely supplanted iPodLinux. Some third party installers are still available.[1]
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iPodLinux in essence consists of a Linux kernel built from μClinux sources using the uClibc C standard library with driver code for iPod components (or reverse engineered drivers where available). It includes userland programs from μClinux and/or BusyBox, a UNIX-style file system (which can be created within HFS+ formatted iPods, or an ext2 partition on FAT32 formatted iPod), and the Podzilla GUI (and its modules). Apple's proprietary iPod OS in contrast uses an invisible boot loader and is based on an ARM processor kernel originally written by Pixo, and the iPod Miller Columns browser program, a GUI written by Apple and Pixo using the Pixo application framework, and other firmware and component drivers written from manufacturer's reference code to support the standard behavior Apple wanted the iPod to have.
 | This section relies largely or entirely upon a single source. (September 2017) |
Besides the kernel, iPodLinux features as a primary component podzilla and podzilla2, applications which provide:
The bootloader for the 4th generation iPod was extracted by Nils Schneider, a German computer science student. Previous software methods to extract the necessary bootloader no longer worked. Bernard Leach had previously discovered how to operate the piezo buzzer inside the iPod. Schneider was able to use his program with some modifications to make a series of clicks for each byte of the new iPod's bootloader. The extraction process took 22 hours to complete and required Schneider to construct a soundproof box to prevent outside interference with the process.[3]
On June 11, 2008 the organization's website was suspended and replaced with a redirect to a blank page.[4] The server had its services restored incrementally.[5] On October 1, 2008 the iPodLinux.org DNS address was updated and the server was online again by October 5, 2008. On June 22, 2009 the server was pulled offline again. The server was back online again on September 8. In September 2010 the server went offline again and has not got online again yet. Alexander Papst, one of the developers, has posted a mirror of the site at ipodlinux.wiki.[6] In 2015, the site was offline. However, in 2019, it has gone online, with embedded text advertisements.[7]
According to the iPodLinux wiki, "developers have succeeded in getting [the following features] to work- it does not imply that the feature is ready for widespread use."[8]
| Generation | Date[note 1] | LCD | Input | Serial[note 2] | Hard drive | Piezo | Audio playback | Audio recording | FireWire | USB | Power management | Video out |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1G | October 2001 | Yes | Yes | Yes | Yes | Yes | Yes | — | Yes | — | No | — |
| 2G | July 2002 | Yes | Yes | Yes | Yes | Yes | Yes | — | Yes | — | No | — |
| 3G | April 2003 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Partial[note 3] | Partial[note 4] | — |
| 4G | July 2004 | Yes | Yes | No | Yes | Partial[note 5] | Yes | Partial[note 6] | Partial[note 3] | Partial[note 3] | Partial[note 4] | — |
| Photo/Color | October 2004 | Yes | Yes | No | Yes | Partial[note 5] | Yes | Partial[note 6] | Partial[note 3] | Partial[note 3] | Partial[note 4] | No |
| 5G | October 2005 | Yes | Yes | No | Yes | Partial[note 5] | Yes | No | — | Partial[note 3] | Partial[note 4] | No |
| 5.5G | October 2006 | Yes | Yes | No | Yes | Partial[note 5] | Yes | No | — | Partial[note 3] | Partial[note 4] | No |
| Classic | September 2007 | No | No | No | No | No | No | No | No | No | No | No |
| iPod Touch and iPhone[note 7] | September 2007 | No | No | No | No | No | No | No | No | No | No | No |
| Mini 1G | January 2004 | Yes | Yes | No | Yes | Partial[note 5] | Yes | — | Partial[note 3] | Partial[note 3] | Partial[note 4] | — |
| Mini 2G | February 2005 | Yes | Yes | No | Yes | Partial[note 5] | Yes | — | Partial[note 3] | Partial[note 3] | Partial[note 4] | — |
| Nano 1G | September 2005 | Yes | Yes | No | Yes | Partial[note 5] | Yes | No | — | Partial[note 3] | Partial[note 4] | — |
| Nano 2G–7G | September 2006 | No | No | No | No | No | No | No | No | No | No | No |
As of August 5, 2006, only the 1st, 2nd, and 3rd generation iPod are officially supported by iPodLinux,[citation needed] although newer generations are also partially compatible.[9] The iPodLinux project does not plan support for the iPod shuffle due to the lack of a GCC compiler for the shuffle's DSP57000 core, as well as the fact that the iPod shuffle lacks a screen.[10] While later generations work fine for many uses of iPodLinux, not all features work; these later generations will not be officially supported by the project until most or all features from the earlier iPods work on them. Installers are in the process of being made. As of now, there is Installer 2.3 for Microsoft Windows or Linux which can install on any generation iPod (except for the iPod shuffle and iPod nano 2nd generation). As of April, 2008, iPodLinux does not work on the new iPod firmware included with the second and third generation iPod nano or the 6th generation iPod Classic, and installer 2 cannot be used to install iPodLinux on 5.5th generation iPod. In addition to that, the much spoken about audio recording feature currently does not work on the latest ipodlinux/zeroslackr builds. In ipodlinux, an under development message is given under recording, while in zeroslackr, recording is not displayed at all.
Arguably one of the project's more notable accomplishments is its video player, released months before rumors about Apple's Video iPod began to spread. This video player only plays uncompressed AVI files, which are basically just a series of bitmap formatted frames with an audio overlay that commonly loses sync with the video output. A new compression technique called MoviePod, released in 2006, enables people to put more video content on their iPod. This function continues to be developed and is a useful function for users of older iPod (especially nano users that, with the help of iPodLinux, can get an extremely small media center that can be held in the palm of the hand).[11]
podzilla 2, the second generation of podzilla, and commonly known as pz2, has superseded the original version of podzilla. It included several new features, most notably modularity; users can install new applications without recompiling all of podzilla. This version is the only working set of Podzilla official that will run on 5.5G iPods.
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