Excavating
Patent
1993-06-30
1995-04-25
Voeltz, Emanuel T.
Excavating
371 225, 365900, 3642407, G06F 1100
Patent
active
054105447
ABSTRACT:
An apparatus for testing a unit comprising an internal processor coupled to a register by an internal bus. The internal processor is programmed so that it can execute an algorithm. When executed, the algorithm performs an operation on the unit. The register is for storing a state datum. The internal bus is used by the internal processor to access the state datum when the internal processor is executing the algorithm. The testing apparatus comprises an external processor disposed external to the unit and an interface and switch disposed on the unit. The interface is coupled to the internal and external processors and is for receiving a plurality of commands from the external processor. The commands include an internal processor command and an open trap command. If issued, the internal processor command causes the internal processor to execute the algorithm. The switch is coupled to the interface and coupled between the internal processor and the internal bus. If the interface receives the open trap command, the switch permits the external processor to access the state datum of the register.
REFERENCES:
patent: 4495567 (1985-01-01), Treen
patent: 4969148 (1990-11-01), Nadeau-Dostie et al.
patent: 5016212 (1991-05-01), Yamaguchi et al.
patent: 5212776 (1993-05-01), Zandveld et al.
patent: 5245572 (1993-09-01), Kosonocky et al.
patent: 5297148 (1994-05-01), Harari et al.
Durante Richard J.
Kreifels Jerry A.
Rashid Mamun
Rozman Rodney R.
Intel Corporation
Miller Craig Steven
Voeltz Emanuel T.
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