Virtual memory image controller for multi-windowing
US4815010A · kind A · utility
Inventor
Key dates
| Filing date | May 13, 1986 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | May 13, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A virtual memory image controller for multi-windowing, comprises a bidimensional image memory organized in N elementary blocks, N being an integer, the blocks being of fixed size and rectangular, a random access read/write memory containing a sequence of N pointers, each pointer noting the beginning address of a block in the image memory, a video signal generator delivering a video signal corresponding to the contents of n blocks of the image memory, NSN, for the display on a screen of the image composed of n blocks organized in amatrix, the blocks be ing addressed by the video generator via a table of indirection, an interface for read/write accesses to the image memory, the accesses being made via the indirection table, the controller comprising also a data bus, an address bus, a command bus, and a sequencer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.