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Diagnostic system for a data processing system

  • US 4,315,311 A
  • Filed: 12/07/1979
  • Issued: 02/09/1982
  • Est. Priority Date: 10/28/1975
  • Status: Expired due to Term
First Claim
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1. In a data processing system including at least one transmitter member having program storage means, data processing means and checking circuits for the transmitter member;

  • at least one data processing unit having data processing means capable of executing programs stored in the transmitter member and having checking circuits for the processing unit; and

    a receiver member having means for recording data resulting from the execution of programs by the processing unit, data processing means, and checking circuits for the receiver member;

    a diagnosis system comprising;

    the program storage means of the transmitter member including means for storing diagnosis programs for the diagnosis of the data processing means of the transmitter member, the data processing means of the one data processing unit, and the data processing means of the receiver member;

    the data processing means of the one processing unit being capable of executing diagnosis programs stored in the program storage means of the transmitter member;

    the recording means of the receiver member including means for recording data resulting from execution in the one processing unit of diagnosis programs stored in the program storage means of the transmitter member;

    each of the diagnosis programs stored in the program storage means of the transmitter member including instructions to allow the one processing unit to introduce test data into a data processing means to be diagnosed and to allow the one processing unit to transfer data resulting from the tests to the recording means of the receiver member; and

    a diagnostic input/output circuit responsive to error signals from the various checking circuits and operable in a diagnostic mode to read appropriate diagnostic programs from the program storage means of the transmitter member for execution by the data processing means of the one data processing unit, to connect the data processing means of the one processing unit to the data processing means to be diagnosed for the transmission of test data and instructions, and to connect the data processing means of the data processing unit to the recording means of the receiver member for recording results of diagnosis.

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