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
Mirac proteins
Display system, display control method and computer program
Mechanisms for marking the orientation of a sawed die
Image forming apparatus with static elimination
Health monitoring of applications in a guest partition
Switchable solvents and methods of use thereof
Semiconductor devices having through electrodes and methods of fabricating the same
  Randomly Featured Patents
Blackberry-Shawnee cultivar
Valve for controlling the flow of fluids in conduits and the like
Self-powering headset, devices and related methods
Current/charge-voltage converter
Exercise machine
Substrate for assaying ribonuclease H activity
Tinkle safe
Opaque film compositions
Argyranthemum plant named `M8/20`
Steam attachment for a cleaning apparatus