-- Simulators update a simulation step only up to a certain number of times. -- This would lead to an infinite loop, so any simulators should give an error. -- ghdl uses he --stop-delta option to determine how many steps should be done. library IEEE; use IEEE.std_logic_1164.all; entity stop_delta_tb is end stop_delta_tb; architecture behav of stop_delta_tb is signal s0 : std_logic := '0'; begin -- s0 <= not s0; end behav;