Bidirectional printer interface having function of notifying print data abnormalities from printer to host unit

摘要

A bidirectional printer interface comprises a print monitoring controller provided for a host unit for controlling a printer connected to the host unit to monitor a print state; an analyzer provided for the printer for analyzing environment data for setting a print environment and print data; a storage provided the printer for analyzing storing the print data analyzed by the analyzer; wherein the analyzer compares data in relation to a print environment included in the print data with the environment data stored in the storage to determine the presence of the difference therebetween, and if the difference between the data is detected, the analyzer transmits the content of the difference between the data to the host unit and wherein the printer monitoring controller notifies the user of the content of the difference between the data transmitted from the analyzer.