VIPER microprocessor

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VIPER is a 32-bit microprocessor design created by Royal Signals and Radar Establishment in the 1980s, intended for use in safety-critical systems such as avionics.[1] It was the first commercial microprocessor design to be formally proven correct, although there was some controversy surrounding this claim and the definition of proof.


  1. ^ Churchley, Andrew (1991-11-30). Microprocessor Based Protection Systems. Springer. p. 64. ISBN 9781851666119. Retrieved 23 July 2012. 

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