What instruction register (IR) lengths are supported in JTAG chain by the Intel® Quartus® Prime Programmer? - What instruction register (IR) lengths are supported in JTAG chain by the Intel® Quartus® Prime Programmer? Description When you define the instrustion register (IR) length of an unknow device in JTAG chain using New Device feature of Add Device feature of the Intel® Quartus® Prime Programmer, you can choose one of the following numbers. 2 to 31, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 250, 255 Even if you import a boundary scan description language (*.bsd, *.bsm, *.bsdl) file with IR length larger than 255, the Programmer tool can't support it. Custom Fields values: ['novalue'] Troubleshooting FB: 599657; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']