Title: Character display system

Abstract: A display system is described in which left to right or right to left mode may be displayed without character inversion. A read/write store is added between a display buffer and a CRT. This store stores one complete scan line of character slice bytes in sequence. The bytes may be read out either in a normal sequence or in a reversed sequence for display. As bytes are read in parallel, the orientation of individual characters is unchanged. One line of control data or selected lines may always be displayed in left to right mode, while the remainder of the display is in right to left mode.

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Inventors: Hydes, Alan F. (Southampton, GB)

Application Number: 957371
Filing Date: 1978-11-02
Publication_date: 1980-05-13
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Class(es): 345/467 345/26, 400/110
Other Classes:
US Patent Ref:

3665450	May, 1972	Leban	340/748.
3786478	Jan, 1974	Kin, Jr.	340/728.
3809629	Apr, 1974	Walsh et al.	340/711.
3846784	Nov, 1974	Sinclair	340/755.
3895374	Jul, 1975	Williams	340/723.
3918038	Nov, 1975	Stonelake	340/791.
3976982	Aug, 1976	Eiselen	340/723.
4054948	Oct, 1977	Grier	340/724.
4146877	Mar, 1979	Zimmer	340/723.
4153940	May, 1979	Grier	340/724.

Other Refs:
Primary Examiner: Curtis, Marshall M.
Assistant Examiner:
Attorney: Poag; Frederick D.