Hello pablocool,
the BZZB ADB-box has arrived and have been studying the various sites for info which unfortunately often are in Polish, and Google translations are usually totally incomprehensible. After opening it up and comparing photos on the net I have come to the conclusion it has a modchip (small upright PCB with a jumper and three wires attached). The bootloader is switchable between two USBs, two HDDs, NAND, NFS and B4t, so it is the most universal one. The bootloader sign on is 'boot'; I understood that the B4t loader signs on with 'nbox'.
The main problem I currently have is a silent DEBUG output. I gathered from the info in the net so far that you need to flash it back to original firmware to enable that through a service menu.
Currently,I am busy with the June 1st batch of images; after that I will address the ADB-box.
Regards,
Audioniek.