Why has the disable_chainout signal been removed in the Native Fixed Point DSP Agilex™ FPGA starting in version 24.3.1 of the Quartus® Prime Pro Edition Software? - Why has the disable_chainout signal been removed in the Native Fixed Point DSP Agilex™ FPGA starting in version 24.3.1 of the Quartus® Prime Pro Edition Software? Description The dynamic chainout feature for fixed-point DSP is an advanced feature not officially supported in the Agilex™ 7 & 5 devices. The fixed-point DSP dynamic chainout feature has timing violations that are not identified by the Quartus® Prime Pro software. Resolution Customers are advised to remove any connections to the disable_chainout port and recompile designs in the Quartus® Prime Pro Edition Software version 24.3.1 or later. The removal of this signal has been officially documented in the v3.0.0 Native Fixed Point DSP Agilex™ FPGA IP Release Notes. Additional Information For the Agilex™ 7 and Agilex™ 5 FPGA design developed in the Quartus® Prime Pro Edition Software before version 24.3, customers are advised to run the risk assessment script to ascertain if their design is impacted. Steps to run the script: Run EDA Netlist Writer with the successfully pre-compiled design. Insert the risk assessment script in the Quartus project folder Navigate to the Quartus project folder: cd <quartus project path> Run the command: tclsh screening.tcl ./simulation/questa/<project_name>.vo Follow the message prompted for the next step. Related Articles Error: The dynamic chainout feature for fixed-point DSP is an advanced feature not supported in the current release. Disconnect the disable_chainout port and contact Altera for details. Release Note for Native Fixed Point DSP Agilex™ 7 FPGA IP v20.0.0 Release Note for Native Fixed Point DSP Agilex™ 5 FPGA IP v3.0.0 Custom Fields values: ['novalue'] Troubleshooting 15017127180 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 25.1 24.3.1 ['Agilex™ FPGA Portfolio'] ['novalue'] ['novalue'] ['novalue']