SYSTEME COMPORTANT UN PROCESSEUR ET UNE MEMOIRE ANNEXE ET PROCEDE MIS EN OEUVRE DANS UN TEL SYSTEME

摘要

The information processing system has a first code included in both the external memory and the on-chip memory which is formed from the contents of the external memory. The codes are compared and if different the operation of the system is modified. A second code is incorporated in the external memory and in the internal memory. This code is formed from part of the contents of the external memory. If the codes differ the operation of the system is modified. The first code is used when the system is started, and the second code is used many times during each operation of the system.