Take a look at the new features:
-Game Genie support
-Soft reset
-Portrait full, displaying Genesis full resolution, with the possibility to scroll left/right
-soft reset and pan left/right(to use with "Portrait full" mode) keys are configurable
-Alternate renderer, that might help sometimes
-Accurate timing option (may affect the performance)
-Accurate sprites option (may affect the performance)
-Better speed and compatibility
-and some things more
