Virtual display adapter
US5113180A · kind A · utility
41Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1988 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Apr 20, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/39
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display control such as a virtual display adapter allows the advanced functions of a display controller to be utilized in a large area of memory in addition to the normal use in display memory. This large area of memory includes system memory, and efficient access to this large area of memory is permitted for normal system use. The display controller also functions with non-contiguous and non-resident bitmaps. The flexibility of demand-paged virtual memory is utilized for display tasks, as display bitmaps may be written to the large area of memory as well as the display memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.