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Portable computer having an updatable table of starting addresses for accessing those stored programs having been previously executed

  • US 5,203,001 A
  • Filed: 09/05/1989
  • Issued: 04/13/1993
  • Est. Priority Date: 04/27/1987
  • Status: Expired due to Term
First Claim
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1. A portable computer for storing a plurality of program running-start lines in a buffer of a random access memory, each of the plurality of program running-start lines defining location for a different one of a plurality of programs stored in a read only memory, said plurality of program running-start lines stored in said buffer corresponding to a number less than said plurality of programs stored in said read only memory;

  • the portable computer comprising;

    said buffer;

    said read only memory;

    key input means for selecting a designated program running-start line;

    decision means, coupled to said key input means, said buffer, and said read only memory, for determining whether said designated program running-start line is stored in the buffer;

    first processing means, coupled to said decision means, for searching said read only memory for said designated program running-start line, storing said designated program running-start line in the buffer, which defines the location of a designated program from the plurality of programs in the read only memory, and executing said designated program when said decision means determines that said designated program running-start line fails to exist in the buffer; and

    second processing means, coupled to said decision means, for locating said designated program running-start line in the read only memory without retrieving said designated program from the plurality of programs in said read only memory and immediately executing said designated program when said decision means determines that said designated program running-start line exists in the buffer.

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