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Personal computer using chip-in card to prevent unauthorized use

  • US 5,836,010 A
  • Filed: 03/14/1996
  • Issued: 11/10/1998
  • Est. Priority Date: 03/14/1995
  • Status: Expired due to Term
First Claim
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1. An apparatus for preventing unauthorized use of a computer system by locking a keyboard in the computer system, said apparatus comprising:

  • a card read and write unit having a card reception slot, for determining whether a chip-in card is inserted into said reception slot and for determining whether the inserted card is authorized for enabling an operator to access the computer system;

    a card read and write controller connected to said card read and write unit, for generating an interrupt signal in response to insertion of said chip-in card, and for controlling the reading and writing of information on said chip-in card through said card read and write unit;

    a keyboard for allowing the operator to input commands and/or information to the computer system; and

    a host controller connected to said card read and write controller, for locking the keyboard from inputting commands and information to the computer system and for unlocking the keyboard to allow the input of commands and information from said keyboard to gain access to the computer system in dependence upon said interrupt signal.

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