Installation instructions
=========================
From mories: http://murga-linux.com/puppy/viewtopic.php?p=878960#878960

My SDCard layout is as follows:
1) mmcblk0p1 , FAT, 127 MB
It contains:
- The content of http://downloads.sourceforge.net/project/berryboot/berryboot-20150916-pi2-only.zip
- initrd.rpi2 & vmlinuz.rpi2

2) mmcblk0p2 , EXT4, rest of the SDCard
Here you can put fd-arm.sfs in any directory, e.g. /fatdogarm

As indicated above:
- In config.txt include:
initramfs initrd.rpi2
[pi2]
kernel=vmlinuz.rpi2

- in cmdline.txt include all FatdogArm own parameters:
The parameters for FatdogArm, as indicated in http://distro.ibiblio.org/fatdog/web/arm-index.html#docs :
"FatdogArm shares most of its features with Fatdog64, so please refer to Fatdog64 documentation."
Kernel Command Line Parameters (aka Boot Options)

So, I have included in cmdline.txt for my tests: pkeys=es waitdev=3 savefile=none basesfs=device:mmcblk0p2:/fatdogarm/fd-arm.sfs
But you can use the options you want according to your needs.

I hope this is enough to run FatdogArm (at the native/"traditional" way) in your RPi2.