A data processing apparatus is provided for outputting processed data and data input via an input device, such as a mouse. That data is stored in a memory to be transferred for display in a display device. A controller monitors the data transferred to the display device from the memory, and controls,...http://www.google.de/patents/US5253340?utm_source=gb-gplus-sharePatent US5253340 - Data processing apparatus having a graphics device with priority scheduling of drawing requests
