DATA PROCESSING APPARATUS COMPRISING TWO DIRECT ACCESS MEMORIES COOPERATING AS WELL IN A READING AS IN A WRITING MODE

摘要

The invention relates to data processing systems which make use of an addressable memory. It proposes a method and a system of operation which permits one to particularize or mark for future reference, as desired, certain addresses in the addressable memory by the creation of indicators associated with the particular addresses. These indicators are activated each time one of the particular addresses is called and the system is informed that it has just called up one of the addresses having an associated indicator. The indicators are locations which access subroutines.