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Apparatus and method using an ID instruction to identify a computer microprocessor

  • US 5,790,834 A
  • Filed: 08/31/1992
  • Issued: 08/04/1998
  • Est. Priority Date: 08/31/1992
  • Status: Expired due to Term
First Claim
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1. In a microprocessor formed on an integrated circuit, an identification apparatus for identifying the microprocessor in response to a supplied ID instruction, said identification apparatus comprising:

  • a first register for storing and reading data;

    a read-only memory storing microprocessor ID data including data fields that identify the microprocessor type;

    a decoder for receiving and decoding an ID instruction; and

    control circuitry coupled to the first register, the read-only memory and the decoder, including ID instruction execution means responsive to a decoded ID instruction including for executing the ID instruction received from the decoder, including reading the microprocessor ID data from the read-only memory and storing said microprocessor ID data in the first register.

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