Archos79neon

Architecture

• RK3188T
• RAM 1GB
• Flash 8GB
• WiFi 2.4GHz
• Android 4.2.2 (20140212)

Root

Success

• attempt 1: adb fail (both adb shell (id=shell not root) and adb root)
• attempt 2: apply superuser.zip as update.zip fail (not recongnized as an update)
• attempt 3: dump rom/modify/reflash (WIP) never done
• attempt 4: Try TPSparky method #fail: unable to access /data (/data rwxrwx--x system system ... so no read nor right access to do the trick)
• attempt 5: Use kingo root from windows (apk didn't work) [1] But i wonder how it work?!

Recovery

Start recovery mode manually: ?
adb reboot recovery ;)
recovery functions: apply update.zip reboot/wipe

CWM recovery

1. fail
   

flash CWM recovry as update.zip #fail
Use flash tool #fail (i was at least able to flash my backup)

Flash tool

Download mode: Power & vol +
RK batch tool 1.7 : working
ROM_Flash_Tool_21 :working => usefull to dump NAND

adb

windows 7: working (drivers?!)
adb shell => shell not root
adb root => adbd cannot run as root in production builds

Dumping NAND

source: Freaktab
parameter file (NAND split)

FIRMWARE_VER:1.0.17
MACHINE_MODEL:Archos 79 Neon
MACHINE_ID:007
MANUFACTURER:RK30SDK
MAGIC: 0x5041524B
ATAG: 0x60000800
MACHINE: 3066
CHECK_MASK: 0x80
KERNEL_IMG: 0x60408000
#RECOVER_KEY: 1,1,0,20,0
CMDLINE:console=ttyFIQ0 androidboot.console=ttyFIQ0 init=/init initrd=0x62000000,0x00800000 mtdparts=rk29xxnand:
0x00002000@0x00002000(misc),
0x00004000@0x00004000(kernel),
0x00008000@0x00008000(boot),
0x00010000@0x00010000(recovery),
0x00020000@0x00020000(backup),
0x00040000@0x00040000(cache),
0x00002000@0x00080000(kpanic),
0x0017fd00@0x00082000(system),
-@0x00201d00(userdata)

Sucess full backup made ;) (tested recovery and working)