公开(公告)号：US3902163A

公开(公告)日：1975-08-26

申请号：US41805073

申请日：1973-11-21

申请人： AMDAHL CORP

发明人： AMDAHL GENE M ,  CHIBA TAKASHI ,  TOBIAS RICHARD J

IPC分类号： G06F12/12 ,  G06F12/08 ,  G06F12/10 ,  G06F9/20

CPC分类号： G06F12/1063 ,  G06F12/0864

摘要： Disclosed is a data processing system which operates with multiprogramming and virtual storage. Logical addresses are translated to real addresses by use of translation tables stored in main storage. Each program has its own unique translation table. A buffer memory, including a high-speed logical translation store, stores real addresses which have been translated from logical address by use of the tables. A program identifier store identifies what programs have translated information within the buffer memory. At least one location within the identifier store is maintained empty so as to be available for any new program. In one embodiment, the identifier store is a redundantly addressed memory with less than all locations valid at any one time. In another embodiment, the buffer memory includes N levels of primary/alternate stores, each store having an index portion and a data portion and each portion having a primary and an alternate section.