Quartus® Prime Pro Edition: Version 25.1.1 Software and Device Support Release Notes

ID 683706
Date 8/11/2025
Public

1.2. Changes to Software Behavior

This section documents instances in which the behavior and default settings of the Quartus® Prime Pro Edition software have been changed from earlier releases of the Quartus® Prime Pro Edition software.
Quartus® Prime Pro Edition software version 25.1.1 introduces the following changes:
  • The fast simulation models, initially introduced in Quartus® Prime Pro Edition software version 24.3.1, are now the default simulation models for IP example designs targeting Agilex™ FPGA portfolio devices, except for the following IP:

    • Intel® R-Tile for Compute Express Link Solution
    • AXI Multichannel DMA IP for PCI Express
    • DisplayPort IP

    The fast simulation models are currently supported only for Agilex™ FPGA portfolio IP on Siemens EDA QuestaSim* and Synopsys VCS* . For more information, refer to How do I use the fast simulation models to improve the simulation time in the Quartus® Prime Pro Edition software version 24.3.1 onwards?

  • If there are critical warnings about pins missing Location or I/O Standard assignments, the Quartus® Prime Pro Edition software no longer generates programming files.

    For details about pins that are missing these assignments, refer to the I/O Assignment Warnings report in the Fitter Plan stage.

    For pins that are missing Location or I/O Standard assignments, add the appropriate assignments, and recompile the design.

For a list of all the default assignment settings for the latest version of the Quartus® Prime software, refer to the Quartus® Prime Default Settings File (.qdf):
  • Linux* operating systems: <Quartus Prime installation directory>/quartus/linux64/assignment_defaults.qdf
  • Windows* operating systems: <Quartus Prime installation directory>/quartus/windows64/assignment_defaults.qdf