Method of and apparatus for testing a memory matrix control char

Details Method of and apparatus for testing a memory matrix control char Method of and apparatus for testing a memory matrix control char

1979-12-28

1982-03-09

Atkinson, Charles E.

Excavating

324 73R, 365201, 371 4, 371 24, G01R 3128

Patent

active

043193552

ABSTRACT:
A control character having a predetermined sequence of binary values is written into a control zone of a memory matrix. It is impossible to alter the binary values in the control zone during normal operation of the matrix, but it is possible to read out the values stored in the control zone during normal operation. A comparison is made with the signals read out from the control zone during normal operation with predetermined values for the bits in the control zone, to determine if deleterious effects, during normal operation, have altered the data stored in the remaining zones of the matrix.

REFERENCES:
patent: 3548176 (1970-12-01), Shutler
patent: 3813032 (1974-05-01), King
patent: 3838264 (1974-09-01), Maker
patent: 3940601 (1976-02-01), Henry et al.
patent: 4055754 (1977-10-01), Chesley

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