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Retrieval apparatus including a plurality of retrieval units

  • US 5,179,683 A
  • Filed: 06/13/1989
  • Issued: 01/12/1993
  • Est. Priority Date: 06/14/1988
  • Status: Expired due to Term
First Claim
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1. An information retrieval apparatus comprising:

  • storage means for storing therein data to be retrieved;

    a central processing unit (CPU) for subdividing the data stored in said storage means according to a predetermined unit, for transferring the data to be retrieved and for controlling a start and an end of retrieval processing;

    a first memory for use as a work area for the CPU;

    a first data bus connecting the CPU, the storage means and the first memory;

    retrieval means provided independently of the first bus, said retrieval means including a second memory for temporarily storing the data to be retrieved, a retrieval unit for retrieving the retrieval data stored in the second memory, a processing unit for controlling start and end of retrieval of the retrieval unit, and a second bus connecting the second memory, the retrieval unit and the processing unit, said retrieval means retrieving the retrieval data stored in the second memory and temporarily storing its retrieval result in the second memory; and

    an adapter,to selectively connect the first and second buses, and having an address memory to identify a start address in said second memory, so that an address space of the second memory, specified by the CPU, can be allocated to a specific address space of the first memory to thereby permit the cup to store in the second memory the data transferred from the storage means using the specific address space of the first memory, and the CPU can read a content of the second memory by accessing the address space of the first memory, the data in the specific address space divided in predetermined units by the CPU,and, to allocate the retrieval result stored in the second memory to the specific address space of the first memory.

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