The fail safe architecture for a computer system includes a read only memory (ROM) self-check module, a random access memory (RAM) self-check module and operation code instructions (op code) self-check module which are actuated periodically by a non-maskable interrupt (NMI) to a microprocessor. The microprocessor...http://www.google.com/patents/US4726024?utm_source=gb-gplus-sharePatent US4726024 - Fail safe architecture for a computer system
