In short :
1) Install a 2.6.21-kernel based angstrom image to nand
2) prepare the SD :
- create a linux partition on the SD (I created a big linux partition and a 256Mb swap partition on a 4Gb card )
- format the partition : mkfs.ext3 /dev/mmcblk0p1
- get the rootfs from
http://www.bigbridgezau.sakura.ne.jp/dev/debian/- untar it to the root of the SD (tar -xzpfv ?)
Now you need to put the kernel-modules on the SD as well :
- copy /lib/modules from your nand to the same location on the SD (/media/card/lib/modules)
The debian boot process looks for init.sysvinit instead of init, so :
- cd /media/card/sbin and "ln -s init init.sysvinit"
You need to change the mounted root from the standard /dev/hda1 (Microdrive) for titchy to /dev/mmcblk0p1 (SD-card)
- cd /media/card/etc and edit fstab to make /dev/mmcblk0p1 mount to / and make it bootable. (Also disable the /dev/hdaX entries because you don't have a microdrive)
3) Still in Angstrom : Connect to the net, do an "ipkg update" and then "ipkg install altboot"
4) reboot and hit the "any" key when asked to launch altboot then choose "boot from SD"
(the "any" key is the 35th key counting diagonal from the lower left corner or maybe some other key)
Notes :
You'll have to edit network settings before you can reach your network (/etc/resolv.conf contains some kuro-specific-things)
Root password : kuroadmin ?
I didn't know this when I first installed it, so I edited /media/card/etc/shadow while running Angstrom and removed the password for root (remove everything between the first ":" and the second ":" on the line beginning with "root")
I don't think udev is installed by default -> first time fiddle with modprobe to load the correct drivers (modprobe orinoco_cs or modprobe hostap_cs), configure your network and then "apt-get install udev"
You'd better edit /etc/apt/sources.list as well if you don't want to download everything from a japanese server and affect internet speed everywhere between you and Japan or if you want to upgrade to Lenny.
The 2.6.22 kernel (latest Angstrom) has troubles with altboot, so don't use it for now unless you know how to solve the problems.
Hope I didn't forget anything
This probably works for c7x0-860 as well, somebody ready to test ?
edit : it does work !!!
Chero.