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gptkbp:instanceOf
|
gptkb:personal_computer
|
|
gptkbp:alsoKnownAs
|
magnetic core memory
core memory
|
|
gptkbp:capacity
|
few kilobytes
|
|
gptkbp:category
|
random-access memory
magnetic storage
|
|
gptkbp:component
|
wires
ferrite rings
|
|
gptkbp:dataRetention
|
indefinite without power
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Ferrite Core Memory
|
|
gptkbp:influenced
|
modern RAM design
|
|
gptkbp:introducedIn
|
1951
|
|
gptkbp:inventedBy
|
gptkb:An_Wang
gptkb:Jay_Forrester
|
|
gptkbp:manufacturer
|
gptkb:IBM
gptkb:Honeywell
gptkb:DEC
|
|
gptkbp:nonVolatile
|
true
|
|
gptkbp:obsoletes
|
true
|
|
gptkbp:period
|
microseconds
|
|
gptkbp:readDestructive
|
true
|
|
gptkbp:readWriteSupport
|
true
|
|
gptkbp:reliability
|
high
|
|
gptkbp:replacedBy
|
gptkb:Williams_tube
gptkb:microprocessor
gptkb:delay_line_memory
|
|
gptkbp:restoresDataAfterRead
|
true
|
|
gptkbp:sensitivity
|
radiation therapy
power loss
|
|
gptkbp:shape
|
grid of wires and rings
|
|
gptkbp:significance
|
first reliable random-access memory
|
|
gptkbp:size
|
varied from few bytes to megabytes
|
|
gptkbp:storesDataAs
|
magnetic polarity
|
|
gptkbp:usedFor
|
cache memory
main memory
buffer memory
|
|
gptkbp:usedIn
|
gptkb:IBM_System/360
gptkb:Apollo_Guidance_Computer
gptkb:PDP-8
gptkb:UNIVAC_computers
mainframes
supercomputers
early computers
minicomputers
military computers
spacecraft computers
|
|
gptkbp:usedUntil
|
1970s
|
|
gptkbp:bfsParent
|
gptkb:Magnetic_Core_Memory
|
|
gptkbp:bfsLayer
|
6
|