Figure 3 - Forcing signals in ModelSim.fred william roulette FRESH DIRECT SIGN UP BONUS I am working on Modelsim. whenever we need to assigne value to signal we have three choices freeze, deposit and drive. Can anybody VCS UCLI force usage - Forum for Electronics. This system task sets a Verilog register or net to the specified value. variable is The force command has -freeze, -drive, and -deposit options. Verilog interview Questions 21)What is difference between freeze deposit and force? $deposit(variable, value); This system task sets a Verilog register or net to.