Method and apparatus for providing a configurable display memory for single buffered and double buffered application programs to be run singly or simultaneously
US5742788A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1994 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Jun 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/399
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An arrangement providing frame buffer memory for an output display by which single buffer and double buffered application programs may be run singly or simultaneously is described. An array of video random access memory sufficient to store data for at least two complete frames is configured in three different ways depending on the applications being run. When only programs designed to run on a single frame buffer are run, the memory is configured as a single frame buffer. When a single program designed to run on double frame buffers is run, the memory is configured as two visible frame buffers. When multiple programs designed to run on double frame buffers are run, the memory is configured into one visible and one invisible frame buffer. Additionally, apparatus for selecting data to be furnished to the display depending on whether the program operates as a single buffered program, a double buffered program, or a plurality of double buffered programs is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.