Registers – Transfer mechanism – Traveling pawl
Patent
1975-03-20
1976-05-18
Atkinson, Charles E.
Registers
Transfer mechanism
Traveling pawl
3401461BE, 3401725, 1791752R, G06F 1100
Patent
active
039581110
ABSTRACT:
A diagnostic controller is situated with a pair of duplicated logic units which themselves are remotely situated in relation to a controlling data processing unit. A distinct data path is provided between each of the remote logic units and the data processing unit for the conveyance of control information therebetween. When a remote logic unit appears to malfunction, the data processing unit takes the associated data path out-of-service and transmits commands over the in-service data path to start the diagnostic controller. Responsive to these commands, the diagnostic controller autonomously simulates data received over the out-of-service data path and applies the simulated data to the suspect remote logic unit. Results from this suspect unit are compared by the diagnostic controller with anticipated results wherein a mismatch indicates an actual malfunction in the suspect unit. Any detected malfunctions are reported to the data processing unit over the in-service data path.
REFERENCES:
patent: 3409877 (1968-11-01), Alterman et al.
patent: 3557315 (1971-01-01), Kobus et al.
patent: 3692989 (1972-09-01), Kandiew
patent: 3898621 (1975-08-01), Zelinski et al.
patent: 3908099 (1975-09-01), Borbas et al.
Atkinson Charles E.
Bell Telephone Laboratories Incorporated
Falk J. W.
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