modelsim simulation:
1.Run Command
    method : double-click sim.bat

2.Files Introduction
    sim.bat       : windows bat for modelsim simulation
    path.f        : Filelist for modelsim simulation
    sim.bat       : windows bat for modelsim simulation
    sim.do        : File for Simulation run command
    sim_tcl.tcl   : Tcl for Simulation run command
