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IBM Journal of Research and Development  
Volume 28, Number 3, Page 263 (1984)
Non-impact Printing Technology
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Electrophotographic Printer Control as Embodied in the IBM 3800 Printing Subsystem Models 3 and 8

by C. Barrera, A. V. Strietzel
Control of the IBM 3800 Models 3 and 8 electrophotographic printers is achieved by use of a fundamentally different control system than was used in their predecessors, the Models 1 and 2. As a result, printing of composed pages or electronic overlays can include text of many different font sizes and styles printed in multiple orientations, as well as raster images up to a full page in size. The printers manage stored resources, including fonts, segments of pages, and electronic overlays. Pages are composed inside the printers in a logical sequence, instead of by the more traditional line-by-line sequence. This, as well as the capability to position text and images at any addressable point, enhances usability. A high-speed, table-driven character generator, a new command set, and a microcoded control unit make all of this possible.
Related Subjects: Control theory and systems; Electrophotography; Printing, non-impact