Data processing system emulation with microprocessor in place

Details Data processing system emulation with microprocessor in place Data processing system emulation with microprocessor in place

1988-01-07

1988-11-29

Smith, Jerry

Excavating

371 25, G06F 1130

Patent

active

047886838

ABSTRACT:
Apparatus is provided for testing a data processing system which includes a microprocessor, the testing occurring with the microprocessor in place in the system. The apparatus comprises: a support microprocessor for controlling the testing, a serial-to-parallel and parallel-to-serial converter connected between the support microprocessor and the system microprocessor, means for supplying a series of level sensitive scan design (LSSD) test signals from the support microprocessor through the converter to the system microprocessor, and means for returning the results of the level sensitive scan design test signals from the system microprocessor through the converter to the support microprocessor.

REFERENCES:
patent: 4023142 (1977-05-01), Woessner
patent: 4312066 (1982-01-01), Bantz
patent: 4366540 (1982-12-01), Berglund
patent: 4455654 (1984-06-01), Bhaskar
patent: 4500993 (1985-02-01), Jacobson
patent: 4553090 (1985-11-01), Hatano
patent: 4597080 (1986-06-01), Thatte
patent: 4606024 (1986-08-01), Glass
patent: 4674089 (1987-06-01), Poret
P. A. Beaven, "Card Testing A Microprocessor", IBM Tab, vol. 22, No. 4, 9/1978, pp. 1664-1665.

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