The RBT-802 has a standard Phoenix AwardBIOS. Hit the DEL key on power-up to enter the setup screens.
I was greeted by a password screen. My inspired(?) first guess of bosanova got me into the BIOS.
In the 'Advanced BIOS Features' screen you can set the options for the First, Second and Third Boot Device. The options are:
I set the first to USB-HDD and no problems booting from various pen drives.
The RBT-802 runs a Linux-based OS. According to opening splash screen it is based on Kernel Version 2.6.17.
Any comments? email me. Last update April 2013