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Data interface connected in line between a keyboard and a keyboard port of a personal computer

  • US 5,940,485 A
  • Filed: 06/12/1997
  • Issued: 08/17/1999
  • Est. Priority Date: 06/12/1997
  • Status: Expired due to Fees
First Claim
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1. Apparatus for conveying data to and from a personal computer that bidirectionally communicates with a keyboard through a keyboard port, comprising:

  • at least a first bidirectional data line;

    a data interface unit coupled to at least the first bidirectional data line for conveying the data; and

    a keyboard interface unit electrically connected in line between the keyboard and the keyboard port for transparently transferring keyboard data bidirectionally between the keyboard and the keyboard port of the personal computer, the keyboard interface further electrically connected to the data interface unit for transferring the data between the data interface unit and the personal computer, each byte of the data accompanied by a tag byte.

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