Here is the stock firmware for B13 dual core mini pc.
Download link: Here
(password:geekbuying.com)
the upgrade insturction is the same as the following:
http://blog.geekbuying.com/index.php/2013/02/20/rikomagic-mk802-iiis-firmware-upgrade-guide/
Please notice, B13 just support RKBATCH TOOL Upgrade. don’t support micro sd card upgrade directly.
You just need to follow the instruction,and find the correct position of reset button.
Good Luck.
Geekbuying Team
