Prioritized data transfer through buffer memory in a digital printing system

摘要

A system for retrieving data representative of individual page images to be printed from a disk drive utilizes a priority system in which individual software entities within the printing apparatus compete for functional access to the hard-drive memory. Different elements, such as the decomposer, and other software entities within the control system are assigned priorities, and commands from the various elements and software entities are executed by the control system in order of the priority of their sources.