Resources Contact Us Home
Graphics adapter

Image Number 5 for United States Patent #4897812.

A graphics adapter of the type whose operation is controlled by control data stored therein. The graphics adapter has two sets of loadable control data, one of which is used by a graphics processor in the graphics adaptor and the other of which is used by the processor for the system in which the graphics adapter is used. Because each processor has its own set of control data, control of the graphics adapter is rapidly and easily switched between the processors. Included in the graphics adapter is graphics control apparatus which contains storage for two sets of control data and operates under control of one or the other of them as determined by signals from the graphics adapter. The graphics control apparatus further includes state storage for retaining state necessary for resumption of operation for one processor after the other has used the graphics adapter. The graphics control apparatus can perform both byte and word operations and can emulate byte operations while operating in word mode. Further, the graphics control apparatus may employ either an external or an internal mask to mask data.

  Recently Added Patents
Lighting control device and lighting control method
Squib control circuit
Systems and methods for tracking power modulation
Acoustic measuring instrument
Linear transformer power supply
Application authentication system and method
  Randomly Featured Patents
Laser irradiation apparatus
Effect pigments based on thin SiO.sub.2 flakes
Flexible printed circuit board antenna
Optical waveguide having low optical damage
Oncogene function-inhibitory agent, method for inhibiting oncogene function, and treatment of cancer
Ironing dies
Knock-down merchandise display fixture
Method of inserting terminals into housing with special arrangement
Compositions and methods using substances containing carbon
Chain deposit device for a shopping or baggage trolley