The ipods supported by Rockbox have the following flash chips (based on information in http://ipodlinux.org/Generations
* Various websites which have disassembled the Nano claim it contains the SST39WF400A?
flash chip. However, this is only 512KB, and dumping the flash from within Rockbox shows that there is 1MB of data... See also this picture
Apple's flash code
The Apple code in flash contains the first-stage bootloader, plus two self-contained "application images" - diskmode and diagmode. These are copied to RAM by the bootloader and then executed when the appropriate key combination is detected at boottime by the bootloader.
The contents of the flash can be dumped to disk using the "Dump ROM contents" entry in the Rockbox debug menu. This will create a file in the root called
The flashsplit program can be used to extract the diskmode and diagmode images from such a dump.
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