Why are my Altera devices showing up as unknown devices when I do an auto-detect in the Quartus II programmer? - Why are my Altera devices showing up as unknown devices when I do an auto-detect in the Quartus II programmer? Description A possible reason the Altera® devices are showing up as unknown devices when you do an auto detect when using the Quartus® II programmer is because the JTAG Server was not able to locate the parts file (<quartus_dir>/bin/pgm_parts.txt). To resolve this, make sure this file is available at this location. If you cannot locate this file on your computer, you may need to re-install the Quartus II software. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']