Matrix address decoder for pinball games
US5074558A · kind A · utility
117Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Dec 10, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F7/027
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A matrix address decoder for rolling ball games performs decoding of a sequential identification number and a base address into an offset address corresponding to a memory location containing status information for playfield features or switches. The matrix address decoder also generates a mask byte for use in subsequent logical operations involving the status information contained in memory. The decoded information is returned to the main microprocessor via the system bus. An alternate function returns only the mask byte when the offset address is known by the main microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.