Hello, For the data retrieving from FPGA, and then sending data to the PC, the full speed USB MSD board from www.mitex.us could be used. This board has Papilio Wing format and perfectly fits to Papilio FPGA boards. No SW driver is requiring on the PC. www.mitex.us includes the VHDL source code of the interface between FPGA and MSD, and other VHDL source codes, as well constraint file for Papilio One 500k. Sincerely, SI