Support for Obsolete/Discontinued products will be limited to tools usage and existing documentation.
To determine the latest version of software that supports the device, see (Xilinx Answer 15938).
There are Known Issues answer records for each release of software. For example, for the known issues in ISE 13.x software, see (Xilinx Answer 39243).
For Frequently Asked Questions on the XC4000 Families, see (Xilinx Answer 31383).
For questions related to XCN12026/XCN11003, see (Xilinx Answer 40732).