AXFS (Advanced XIP File System) is a compressed read only file system for linux, Currently developed by Numonyx. It is used for the initrd in the 2nd Generation Cameras.
It appears to be a bit out of date in terms of support these days and only supports 2.6 kernels.
Due to there not appearing to be an unpacker readily available i have built one in python
THIS IS HIGHLY EXPERIMENTAL
This requires to be run as root as it creates device files and will most likely only work on unix systems and will extract into a folder called output,
It requires the initrd image to be called initrd.img and in the same directory as the python script (This will be a command line option when i get a bit of time to add this, Also will make a customisable output directory and will have it not create the device files and give a warning if its not run with EUID=0
WARNING: USE AT YOUR OWN RISK