An ice making apparatus for a refrigerator is disclosed. The predetermined voltage is a negative voltage if a signal charge is an electron, and is a positive voltage if the signal charge is a hole. The system is further able to perform these functions in real-time and present the operator with an intelligent evaluation as to the identification of an emitter, or the presence of a new emitter. The optical disk is further configured so that by inserting it into a magnetic card reader, the reader is able to derive the identification information for a transaction. A link partner may use the state machine to generate flow control update DLLPs for all available virtual channels and transmit the FC update DLLPs contiguously to prevent any given VC from failing to perform an FC update refresh within an FC update timeout period due to injection of large packets ) between the FC Update DLLPs.