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Program Controlled Lock and Unlock

IP.com Disclosure Number: IPCOM000076907D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 20K

Publishing Venue

IBM

Related People

Portanova, MC: AUTHOR

Abstract

In the storage hierarchy it can be desirable to have portions of the high-speed buffer 10 of the memory be free of the replacement algorithm for the memory.

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Program Controlled Lock and Unlock

In the storage hierarchy it can be desirable to have portions of the high- speed buffer 10 of the memory be free of the replacement algorithm for the memory.

In a hierarchical memory, data in the buffer 10 is replaced by a replacement algorithm when not addressed in a given length of time. In many cases, it is desirable to have selected addresses in the buffer 10 to be free of this algorithm and this can be accomplished in two ways. One way would be to make a portion of the buffer memory part of the memory addressing structure for the backing store 12. The storage areas in this portion are then free of the algorithm and under control of the control program. Another manner of accomplishing the same result in a more flexible and dynamic manner, would be to have additional instructions or modified current instructions so that the selected addresses of the backing memory are called for and loaded into the buffer upon demand and at random, and, therefore, will be permanently resident in the buffer memory until released by the control program.

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