Abstract
A design approach is presented for a general-purpose VLSI fault tolerant microprocessor, with redundancy designed into the internal chip architecture. The design features are internal automatic state storage and rollback/retry mechanism and a microprogrammed ALU design. The reliability of the design is estimated using a system model of reliability behaviour, and is compared with that of other fault tolerant design strategies. Finally, the effect of the fault tolerance on processor performance is discussed.
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