Abstract: A simulator interface unit receives simulation results associated with a particular set of result identifiers and generated by an electronic design simulator. For each such result identifier, a history file manager stores a simulation result corresponding to a simulation-time value change. The history file manager additionally stores each simulation result generated beyond a first result activity during the execution of simulation code associated with each simulation-time value. The history file manager maintains an internal-time value that indicates when each stored simulation result was generated during the execution of simulation code, relative to the generation of each other stored simulation result. The history file manager generates a time translation table that associates unique simulation-time values with internal-time values. A results data server, in conjunction with viewing and interface tools, selectively present simulation results in a simulation-time format or a sequence-time format.