Apparatus and method for enhancing the performance of personal computers

  • US 5,506,981 A
  • Filed: 10/01/1993
  • Issued: 04/09/1996
  • Est. Priority Date: 03/29/1993
  • Status: Expired due to Term
First Claim
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1. In combination, a computer system board having a socket for a first microprocessor and a clock for generating a first clock signal intended for the operation of said first microprocessor;

  • an accelerator board connected to said socket to replace said first microprocessor;

    said accelerator board having an upgrade microprocessor thereon for operation under the control of a second clock signal having a frequency greater than that of said first clock signal;

    means responsive to said first clock signal for generating a sub-harmonic signal at a frequency that is a common denominator of the frequency of said first clock signal and said second clock signal with a known phase relationship between said sub-harmonic signal and said first clock signal; and

    phase lock loop oscillator means responsive to said sub-harmonic signal for generating said second clock signal in known phase relationship to said first clock signal.

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