How do I revert from Fast Simulation Models to the Default Simulation Models in Quartus® Prime Pro Edition Software version 25.1.1 onwards?

Follow these steps to revert the "Fast Simulation Models" to "Default Simulation Models" in designs targeting Agilex™ 7 FPGA, Agilex™ 5 FPGA, or Agilex™ 3 FPGA devices in the Quartus® Prime Pro Edition Software version 25.1.1 onwards.

1. Generate the example design from the .ip file or create a custom design for simulation (the same as the current flow).
2. Update the auto-generated simulation script to point to Default Simulation Models by setting the following variables with either of the following methods:
   • Method 1: For Questasim
     • Update the Tcl-based scripts  (msim_setup.tcl) with the following variables:
       • set DEVICES_SIM_LIB_DIR "$QUARTUS_INSTALL_DIR/../devices/sim_lib/"
       • set QUARTUS_SIM_LIB_DIR "$QUARTUS_INSTALL_DIR/eda/sim_lib/"
   • Method 2: For VCS (2-step), VCS (3-step) 
     • Update the qsys-generated script (sh based scripts: vcs_setup.sh or vcsmx_setup.sh) with the following variables:
       • DEVICES_SIM_LIB_DIR="$QUARTUS_INSTALL_DIR/../devices/sim_lib/"
       • QUARTUS_SIM_LIB_DIR="$QUARTUS_INSTALL_DIR/eda/sim_lib/"

The IP example design for these devices has been enabled to use Fast Simulation Models by default in the Quartus® Prime Pro Edition Software version 25.1.1 onwards.

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?