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Remote processor crash recovery

  • US 4,589,090 A
  • Filed: 09/21/1982
  • Issued: 05/13/1986
  • Est. Priority Date: 09/21/1982
  • Status: Expired due to Term
First Claim
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1. In a multiprocessor machine control for controlling the operation of a printing machine having a plurality of machine components cooperating with one another to produce images on support material, the machine control including a plurality of control boards, each of the control boards controlling the operation of a portion of the machine components, one of the components being non-essential for producing images on the support material, one of the plurality of control boards being a master control board connected by reset circuitry to the other control boards, the master control board including a memory for storing status information of the other control boards, the method of recovering from a malfunction involving the control boards comprising the steps of(1) identifying a particular control board manifesting a malfunction,(2) the master control board attempting to reset said particular control board via the reset circuitry,(3) checking the operability of said particular control board,(4) determining said particular control board is inoperable but non-essential for producing image on the support material,(5) continuing operation of the machine to produce images on the support material without the availability of said particular control board and saving status information for said particular control board in said memory.

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