Device independent interface for graphics display devices

Details Device independent interface for graphics display devices Device independent interface for graphics display devices

1994-11-18

1996-01-02

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345 3, G09G 500

Patent

active

054812763

ABSTRACT:
A device independent system and method of displaying text on a graphics display device. The system provides programmed routines in a storage device located on a controller card for the graphics device. These routines are loaded into memory by an operating system during initialization of the operating system. Once loaded, the routines become an extension of the operating system to provide the means for displaying information on the graphics device. Each type of graphics device contains a storage device that provides a set of access routines specifically programmed for the device. These routines have a standard interface across all devices, allowing displaying of textual information to be device independent. The storage device contains multiple sets of routines, one for each processor type capable of utilizing the graphics device, thus processor independence is achieved.

REFERENCES:
patent: 4439762 (1984-03-01), Van Vliet et al.
patent: 4845644 (1989-07-01), Anthias et al.
patent: 4862156 (1989-08-01), Westberg
patent: 4990902 (1991-02-01), Zenda
patent: 5276458 (1994-01-01), Sawdon
Winn L. Rosch, "Hardware Bible", 1992, pp. 502-503.

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