Tandem Computers Incorporated

Javad Khakbaz

Philip R Manela

Eduardo Marcelo Lipiansky

Walter E Gibson

Ko Yamamoto

Michael A Plum

Jeffery A Sprouse

Logic circuitry in the form of an integrated circuit includes a number of scannable registers located at various locations of the logic circuitry to continuously sample signal states thereat. In response to signalling from a maintenance diagnostic processor the scannable registers can be commanded to freeze their content for extraction and observation to determining the operating condition of the logic circuitry.

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San Jose, CA, United States of America

Javad Khakbaz