A Tcl file with the file name of the form <entity name>_hw.tcl. The _hw.tcl file is the underlying format of many Altera-provided IP cores available in the Quartus® Prime Standard Edition software, including Qsys components and MegaCore functions. When you create custom IP components in the Qsys Component Editor, the component is saved in the _hw.tcl format. After your component is created in a _hw.tcl file, you can add instances of your component to a Qsys system, which can then be generated to create output HDL files (Verilog or VHDL) for your Quartus® Prime Standard Edition project.