README for ar725w_factory_full_flash.bin.gz

This is a complete image of the factory flash from an Airlink101 AR725W
wireless router. Airlink is no longer providing any sort of support for
the device, and despite my pleas has not released an archive of the
firmware that came with the device.

This image was obtained using
 nvram restore
 cat /dev/mtdblock/0 > /tmp/config.bin

and fetching config.bin over the web interface. As such, it does not
have the right header to flash over the web interface. I have not
figured out the header format yet so this must be done with the device's
serial console using the u-Boot firmware command line.

Map:
0x000000 - 0x050000	uBoot
0x050000 - 0x130000	Linux Kernel
0x130000 - 0x390000	RootFS
0x390000 - 0x3e0000	LANGUAGE_PACK
0x3e0000 - 0x3f0000	NVRAM
0x3f0000 - 0x400000	NVRAM_FACTORY

Flash base is 0xBC400000. NEVER unprotect 0xBC400000 - 0xBC450000 as it
contains the u-Boot firmware and **erasing it will brick your device.**
This image contains u-Boot from my board but also contains the hardcoded
MAC (at 0x40004) of my device. Thus, flashing it will change your
device's MAC address unless you patch the image. So, in short, don't do
it! I have no idea how to fix a board whose u-Boot has been erased.

The MAC in the NVRAM_FACTORY section does not match my device so it
apparently is not used for anything.