US Patent No: 5,561,767
Number of patents in Portfolio can not be more than 2000
Safety critical processor and processing method for a data processing system
Stats
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Oct 1, 1996
Issued date -
Mar 7, 1995
filing date -
08/400,630
serial no -
Expired
status
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Abstract
A system and method for operating application software in a safety critical environment have a data processor for effecting processing operations and an intermediate shell for interacting with an operating system and application software. A safety critical processor is receptive of a series of timing signals from the intermediate shell for determining that a time interval between two of the series of timing signals is greater than a predetermined value thereby constituting a potential safety critical failure and indicates a potential safety critical failure to the intermediate shell.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,674,038 Recovery of guest virtual machines after failure of a host real machine | 83 | 1984 | |
| 5,130,922 Multiprocessor cache memory system using temporary access states and method for operating such a memory | 31 | 1989 | |
| 5,008,805 Real time, fail safe process control system and method | 79 | 1989 | |
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| 4,695,946 Maintenance subsystem for computer network including power control and remote diagnostic center | 173 | 1984 | |
| 4,701,845 User interface processor for computer network with maintenance and programmable interrupt capability | 98 | 1984 | |
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| 5,339,261 System for operating application software in a safety critical environment | 16 | 1992 | |
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| 5,319,645 Method for debugging and testing the correctness of programs | 36 | 1991 | |
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| 4,787,031 Computer with virtual machine mode and multiple protection rings | 65 | 1985 | |
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| 4,839,745 Computer memory back-up | 15 | 1986 | |
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| 5,175,847 Computer system capable of program execution recovery | 19 | 1990 | |
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| 4,726,024 Fail safe architecture for a computer system | 38 | 1986 | |