Xerox Corporation

Steven E Chen

Michael C Lacagnina

Mark A Smith

Michael A Wiegand

David Plakosh

Norman E Wright

Frederic J Stann

Juan A Romano

In a real-time printing system, in which large blocks of digital data corresponding to page images must be located in a memory via a translation table and accessed from the memory within a very narrow time frame, the memory-management internal program of an operating system is overridden by external instructions which lock the translation table in memory.

Real-time image data access from virtual memory in a digital printing

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.

Prioritized data transfer through buffer memory in a digital printing

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Penfield, NY, United States of America

Steven E Chen