You can use this for programming or backing up the bootloader on your Bifferboard.
The board comes with two cables: A 6-way connector for connecting to the Bifferboard JTAG (pictured), and also a male-to-male parallel port extender cable to connect to the PC (not pictured). The parallel connector on the board itself is female.
The board comes complete with the BiffJTAG software which allows dumping from and writing to your Bifferboard flash memory. It can write/dump the top 1MB of flash or just the BIOS area. It's likely that BiffJTAG can also read other RDC devices based on the R8610 or R3210 cpu since the JTAG protocol is the same, however BiffJTAG probably doesn't support writing to them, because most have different (unsupported) flash chips. BiffJTAG supports only EN29LV800B, EN29LV320B and EN29LV640B flash chips.
The software only supports a parallel port at 0x378. It uses direct IO port access to the port, so please ensure no printer daemons or other software that may interfere with the JTAG operation is running. You need to be root to run it.