Generating FPGA Xchange-Format Files for Use with Other EDA Tools
You can generate a FPGA Xchange-Format File (.fx in the Quartus II software that can be used for symbol generation in the Mentor Graphics I/O Designer software.
In the Board-Level Symbol box, select FPGA Xchange in the Format list.
Type or browse to the location you want to use as the output directory for the FPGA Xchange-Format File. The default location is \<project name>\board\fpgaxchange.
To generate the FPGA Xchange-Format File (.fx), compile the design.
Note: The EDA Netlist Writer places the FPGA Xchange-Format File in the specified directory. If you have already compiled the design, and want to specify different EDA tools settings and generate output files without recompiling the design, on the Processing menu, point to Start and then click Start EDA Netlist Writer.
You can then use the generated FPGA Xchange-Format File in the I/O Designer software.
Literature
> 
