×

Dual ported speed up memory in ROM location for engine analyzer

  • US 4,903,220 A
  • Filed: 01/27/1988
  • Issued: 02/20/1990
  • Est. Priority Date: 01/27/1988
  • Status: Expired due to Fees
First Claim
Patent Images

1. A diagnostic engine tester comprising:

  • RAM memory means;

    data acquisition means, including a microprocessor and register means coupled to said RAM memory means, for acquiring test signals from an engine for storing them in digital form as data in said RAM memory means;

    system microprocessor means, including a memory, for processing data, including said stored engine test signals from said RAM memory means and for accessing said RAM memory means, said data acquisition means and said system microprocessor means operating substantially independently of each other; and

    control logic means for regulating access to said RAM memory means by said data acquisition means and said system microprocessor means.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×