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A Store Resettable to Zero in Blocks

IP.com Disclosure Number: IPCOM000091225D
Original Publication Date: 1969-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Austin, PC: AUTHOR

Abstract

In a store in which blocks of data are allocated to different users, security of a user's data is a problem when a block is allocated to a new user. A clear data instruction can selectively clear a block of storage in a single operation before transferring that block to a new user. In a storage system constructed from semiconductor circuits, each block of storage is supplied with power by a separate transistor. A decoder, controlled by the clear data instruction, selects the transistor of the appropriate block so that the power to that block is turned off and the data in that block is lost. If the storage circuits are asymmetric and assume the one state when the power is turned on, the correct parity is obtained. This storage system can be advantageously used in buffer stores.

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A Store Resettable to Zero in Blocks

In a store in which blocks of data are allocated to different users, security of a user's data is a problem when a block is allocated to a new user. A clear data instruction can selectively clear a block of storage in a single operation before transferring that block to a new user. In a storage system constructed from semiconductor circuits, each block of storage is supplied with power by a separate transistor. A decoder, controlled by the clear data instruction, selects the transistor of the appropriate block so that the power to that block is turned off and the data in that block is lost. If the storage circuits are asymmetric and assume the one state when the power is turned on, the correct parity is obtained. This storage system can be advantageously used in buffer stores.

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