Table of Contents
SOSBoot is the AC100 Swiss Army knife. It's a minimalistic self containing linux system designed to solely fit inside the Recovery partition of the AC100.
Where to install ?
Although SOSBoot can be installed in place of the main kernel, it's the most useful when installed on the recovery partition (5-th partition in terms of nvflash). So that the AC100 boots by default your favorite OS, and SOSBoot stays available as a recovery system in case something goes badly wrong.
Please note that booting a different system through the recovery menu is only supported on the bootloader provided by Android 2.1. If you have upgraded your AC100 to Android 2.2 prior to install linux, it's highly advisable to downgrade your AC100 to Android 2.1 (you do have backups, don't you ?)
Official SOSBoot images are available from there: http://share.grandou.net/ac100/sosboot/ sosboot-r4.img latest for now.
To clean ac100 using external computer
nvflash --bl harmony/fastboot.bin --sync nvflash -r --download 5 sosboot.img
From a working AC100 system
check that your sos partition is /dev/mmcblk0p1
abootimg -i /dev/mmcblk0p1
and install it:
dd if=sosboot.img of=/dev/mmcblk0p1
Power on you ac100 with “Home” key pressed, press 1 in the boot menu.
Tips and Tricks
Sosboot in 6 partition
(You dont really need this for normal sosboot usage)
To install sosboot in 6 partition you shoud extract it with abootimg
abootimg -x sosboot.img
and create again with new bootimg-part6.cfg:
bootsize = 0x800000 pagesize = 0x800 kerneladdr = 0x10008000 ramdiskaddr = 0x11000000 secondaddr = 0x10f00000 tagsaddr = 0x10000100 name = SOSBOOT r4 cmdline =
abootimg --create sosboot-part6.img -f bootimg-part6.cfg -k zImage -r initrd.img
SOSBoot sources are hosted on gitorious: http://gitorious.org/ac100/sosboot
Retrieve git repository:
$ git clone git://gitorious.org/ac100/sosboot.git
$ cd sosboot $ ./build_all
Please note that build has been only tested on a cross-compile environment