Device protection method and apparatus
US3986169A · kind A · utility
11Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1975 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | May 30, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/161
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a multi-computer system having input/output devices for common use, protection is made for the devices upon transferring of the input/output data by comparing a device identifying number or address signal and a number signal identifying a central processor unit which demands the transfer of data, thereby to determine on the basis of the result of the comparison whether the data transfer between the device and the central processor unit is allowable. When the transfer is not admitted, the input/output operation of the device is inhibited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.