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