Historically, pinball machines have used a central mounted I/O board connected to the first CPU controlled by a customized microcontroller System operating an in-house operating method. Rollovers: These are typically targets activated any time a ball rolls above them. Usually a number of rollover targets are positioned side-by-side and with https://issuu.com/businesscenter1995/docs/foo_fighters_pinball_machine_le.docx/s/49332959