S5L8900

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Revision as of 21:33, 15 August 2009 by Camerlingue (talk | contribs) (DFU mode)
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This is the Application Processor shared between the iPhone, iPod touch, and the iPhone 3G. Not much is known about it through official sources. This processor is not used in any of the newest devices, being replaced by the S5L8720 and S5L8920.

Firmware File Formats

See this page for more information on the types of firmware files it interprets

Exploits

Userland

iBoot / Kernel

Bootrom

Boot Chain

VROM->LLB->iBoot->Kernel->System Software

One of the iPhoneLinux goals are to replace that Boot Chain after iBoot :
VROM->OpeniBoot->Linux Kernel->X Server->Window Manager

Upgrade Process

Restore mode

The common upgrade process chain is VROM->DFU->WTF->iBoot->Kernel->Ramdisk->Restore, also called restore mode.

DFU mode

See full article here. To flash an older version of the iPhone software you have to let your phone reside in DFU. In iTunes you have to press the Alt-Key (Mac) or the shift-key (Windows) when pressing 'Restore' to be able to manually chose an update file (ipsw file). In Windows you must press ALT key not the shift key!

Boot Chain

VROM-->DFU