Storage medium, system and method for image forming and copying

摘要

A copying system consisting of a scanner and a printer which are directly connected, including a printer controller controlling a printer engine based on data received from an external computer via a network line, an interface switching unit switching the occupancy of the printer engine between the printer controller and the scanner, and a controller that makes the printer controller occupy the printer engine by means of controlling the interface switching unit when a trouble occurs while the printer engine is occupied by the scanner.