Memory address system for data protection - has predetermined limit and two memories with replacement system for first memory by second

摘要

The system comprises means to protect a first information structure submitted to a memory by the use of a selective access memory contained in a second information structure. The first structure has information address values lower than a predetermined address limit, and the second struct ure values higher than the predetermined limit. A repertoire contains teh address codes. A menas is included to add the value of the relative address to the predetermined address limit. Also included is a replacement procedure for the original factors by addresses equal to the original values plus the value of the predetermined limit. The tabular replacement system operates by a pointer situated at the address limit. The entire system involves a central processor unit and a memory unit for the microcodes.