Boots – shoes – and leggings
Patent
1980-01-14
1982-12-28
Chan, Eddie
Boots, shoes, and leggings
371 68, G06F 1100, G06F 1300, G06F 1516
Patent
active
043665357
ABSTRACT:
A signal-processing system, e.g. for a telephone exchange, comprises n modular processing units each including a pair of identical microprocessors operating in parallel on binary signals arriving over an internal bus, only one microprocessor of each pair being enabled to transmit outgoing messages to that bus while the other operates as a dummy. The two microprocessors are interlinked by a correlating connection enabling verification of their correct operation in response to microinstructions read out from respective microprogram memories thereof under the control of a common clock. A momentary divergence, resulting from a relative lag in the response of one microprocessor to an asynchronously arriving signal bit, results in a delay of the microprogram by one clock cycle to permit resynchronization; longer-lasting disparities lead to a deactivation of the microprocessor pair and to the emission of an alarm signal. Processing information individual to the associated peripheral unit is stored in an internal memory connected to the bus; general information utilizable by any processing unit is stored in several outside memory banks accessible through external extensions of the internal bus of any such unit. The processing units may be hierarchically organized in several tiers of different ranks.
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Cedolin Riccardo
Chiarottino Wolmer
Giandonato Giuseppe
Giorcelli Silvano
Martinengo Giorgio
Chan Eddie
CSELT - Centro Studi e Laboratori Telecomunicazioni S.P.A.
Ross Karl F.
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