Magnetic-core memory
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Magnetic-core memory was the predominant form of random-access computer memory for 20 years (circa 1955–75). It uses tiny magnetic toroids (rings), the cores, through which wires are threaded to write and read information. Each core represents one bit of information. The cores can be magnetized in two different ways (clockwise or counterclockwise) and the bit stored in a core is zero or one depending on that core's magnetization direction. The wires are arranged to allow an individual core to be set to either a "one" or a "zero", and for its magnetization to be changed, by sending appropriate electric current pulses through selected wires. The process of reading the core causes the core to be reset to a "zero", thus erasing it. This is called destructive readout.
- Related: Delay line memory, Core dump, Core rope memory, Twistor memory, Bubble memory, Thin-film memory, MRAM, Ferroelectric RAM
| Interactive Java Tutorial - Magnetic Core Memory Interactive Java Tutorial - Magnetic Core Memory www.magnet.fsu.edu/.../index.html - Web |
| Core Memory Core Memory www.columbia.edu/acis/history/core.html - Web |
| Navy Manual Navy Manual www.ed-thelen.org/comp-hist/navy-core-memory-desc.html - Web |
Gallery for «Magnetic-core memory»
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| Core Memory on the PDP-11 Core Memory on the PDP-11 www.psych.usyd.edu.au/pdp-11/core.html - Web |
| Core memory and other early memory types Core memory and other early memory types www.oldcomputers.arcula.co.uk/bhist7.htm - Web |
| Coincident Current Ferrite Core Memories Coincident Current Ferrite Core Memories ed-thelen.org/comp-hist/Byte/76jul.html - Web |
| Casio AL-1000 calculator Casio AL-1000 calculator www.vintagecalculators.com/html/casio_al-1000.html - Web |
| Still used core memory Still used core memory www.technikum29.de/en/computer/storage-media#core-memory - Web |
| A 110-Nanosecond Ferrite Core Memory A 110-Nanosecond Ferrite Core Memory www.research.ibm.com/journal/rd/112/ibmrd1102D.pdf - Web |
| background on core memory for computers background on core memory for computers www.cs.ubc.ca/~hilpert/e/coremem/index.html - Web |
