Excavating
Patent
1981-07-23
1983-11-08
Nusbaum, Mark E.
Excavating
364200, G06F 1110
Patent
active
044146698
ABSTRACT:
The present invention relates to pipeline processors having testing means for identifying malfunctioning modules and for testing the self-testing means themselves. The testing employs the parity check principle and provides an on-line test of memory modules and an off-line test at the processor clock rate of both memory and arithmetic modules. The means for testing include a parity encoder associated with each module and a comparator which couples parity "comparison values" to a priority encoder, operating at the high speed clock rate of the pipeline processor. The test results are then supplied to a RAM, also operating at the clock rate of the pipeline processor. With the test results in the memory, a microcomputer is provided to search the memory at a slower rate for the highest priority failed module. Means are also provided for parity checking the testing means such as the test vector generator, as well as the pipeline processor
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Heckelman Richard W.
Marchant Christopher E.
Williams Jack B.
Baker Carl W.
General Electric Company
Harkcom Gary V.
Lang Richard V.
Nusbaum Mark E.
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