Dual-mode graphics controller with preemptive video access
US5752010A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Sep 10, 1993 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Sep 10, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/127
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and architecture for a graphics controller chip. The graphics controller has a display memory for storing video and graphics data. It also has a logic controller, connected to the memory, for performing logic operations on data stored in the memory. Video and graphics data is made available to the graphics controller at a single access port. The graphics controller also has an address range detector for checking the address of the data provided to the port and for disabling logical operations of the logic controller when the address indicates the presence of video data. The video data is thereafter transferred to the display memory on a priority basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.