Display system having a font cache for the temporary storage of font data
AssigneeInternational Business Machines Corporation
InventorsRoy B. Harrison, David C. Haigh, Roger T. Wood
Life of this patent
Estimating the term…
Abstract
A display system has, in addition to a display memory for the main storage of display information for a character mode, a separate cache for the temporary storage of the definitions of one or more fonts currently required for display and control logic for updating the font cache from the display memory. This enables the efficient support of a character mode on a display system, particularly where the display memory of that system is implemented with dual-ported memory technology. Compatibility with existing display standards is achieved.
Claims14
A display system comprising a display memory for storage of information for display on a display device, said information including a set of character font definitions, a font cache for temporary storage of definitions of one or more character fonts currently required for display and control logic for updating said font cache from said display memory.
A method of displaying information on a display device of a display system comprising:
- storing said information in a display memory, said information including at least one set of character font definitions;
- and
- temporarily storing said at least one set of character font definitions in a font cache for access by a serialiser connected to said display device.
Dependencies are inferred from the claim text.