I am seeing a discrepancy between the version bits of the BSDL IDCODE. On some parts I am seeing a '0000' binary and on others (two so far) I am seeing a '0001' binary. The chips look identical according to the markings on their case. The BSDL file on the website calls out a '0000' binary for the version number of the IDCODE.
Can someone tell me or show me a document that defines what the differences are between the these versions? My fear is that I have some counterfeit chips.
The discrepancy caused my XJTAG software to stop with an error. I have been told that I can modify the BSDL file to make the bit a don't care by replacing the 0 with an 'x'.
attribute IDCODE_REGISTER of elvis_io_ring: entity is