Raster line comparator circuit for video game
US4572506A · kind A · utility
8Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Jun 3, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/272
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A comparator circuit incorporated into a video game device and operated responsive to first and second non-overlapping clock pulses can be used to compare background information location to SPRITE information location for both raster line (vertical) and column (horizontal) coordinates to provide a high speed interrupt signal to a central processor unit (CPU) triggering a processing of SPRITE or other features' display instead of a processing of background display, the comparator being implemented in less silicon area and having a lower power usage than other types of circuit implementations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.