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gptkbp:instanceOf
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gptkb:personal_computer
gptkb:SDRAM
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gptkbp:alsoKnownAs
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core memory
ferrite core memory
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gptkbp:bitStorage
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one bit per core
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gptkbp:capacity
|
kilobytes to megabytes
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gptkbp:component
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gptkb:CDC_6600
gptkb:IBM_System/360
gptkb:PDP-8
gptkb:UNIVAC_computers
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gptkbp:dataRetention
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non-volatile
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gptkbp:introducedIn
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1951
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gptkbp:inventedBy
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gptkb:An_Wang
gptkb:Jay_Forrester
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gptkbp:legacy
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first reliable random-access memory
|
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gptkbp:material
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gptkb:ferrite
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gptkbp:obsoletes
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yes
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gptkbp:peakPeriod
|
1950s
1960s
early 1970s
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gptkbp:period
|
microseconds
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gptkbp:readProcess
|
destructive read
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gptkbp:readWriteSupport
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random access
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gptkbp:reliability
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high
|
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gptkbp:replacedBy
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gptkb:microprocessor
1970s
|
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gptkbp:shape
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toroidal core
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gptkbp:storesDataBy
|
magnetizing ferrite cores
|
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gptkbp:usedIn
|
early digital computers
mainframes
computers
minicomputers
|
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gptkbp:wiresPerCore
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typically 3 or 4
|
|
gptkbp:writeProcess
|
magnetic field switching
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gptkbp:bfsParent
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gptkb:Williams–Kilburn_tube
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gptkbp:bfsLayer
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6
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https://www.w3.org/2000/01/rdf-schema#label
|
magnetic-core memory
|