Character display device for synchronizing operation of video ram to operation of CPU
US5339160A · kind A · utility
8Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1993 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Apr 16, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Specific clock periods in each machine cycle MC used by a CPU are used for accessing a video RAM synchronized with the operation of the operation of the CPU and the remaining clock periods of the machine cycle MC are used for accessing the video RAM synchronized with horizontal scanning and vertical scanning of television signal. Therefore, accessing synchronized with television signals is also performed in response to clock periods of a machine cycle MC and the video RAM can be made of a single port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.