Information processing system having diagnostic processor for detecting failures in the diagnostic processor itself and performing retries upon failure detection
US5249299A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1990 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Jun 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2215
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an information processing system comprising a diagnosing unit (15) for carrying out, in response to an activation signal (17), a diagnosing operation for a main memory (10), a standard processor (11 or 12), and a system controller (13), a state indication area (20) stores a state signal which is produced by a monitoring unit (18) monitoring the diagnosing unit to indicate whether the diagnosing operation is possible and impossible and which, when the diagnosing operation is impossible, makes a diagnosis control unit (19) control retry of the diagnosing operation. Through a request controller (27) operable as a read request supply unit, the state signal is read by a read request signal produced by a signal producing unit (21) to make a judging unit (29) make a delivery control unit (24) allow and inhibit, when the diagnosing operation is possible and impossible, delivery as the activation signal of a communication signal produced by the signal producing unit through a communication controller (25) operable as a communication request supply unit. The state signal is stored in the state indication area by a write request signal produced by the signal producing unit and sent through…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.