Input/output and diagnostic arrangements for programmable machine controllers having multiprogramming capabilities
US4086658A · kind A · utility
11Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1976 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Oct 4, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A programmable controller includes a random access memory for storing signals relating to a plurality of programs executable in the controller. A portion of the memory addressing is zoned for enabling one or more programs to have exclusive access to that zone. The addressability of input/output registers, diagnostic registers and selected other units of common interest to all such programs are addressable in each of the plurality of zones as if such registers were uniquely assigned to such respective memory zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.