Magnetic-core memory
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In computing, magnetic-core memory is a form of random-access memory. It predominated for roughly 20 years between 1955 and 1975, and is often just called core memory, or, informally, core.
A 32 × 32 core memory plane storing 1024 bits (or 128 bytes) of data. The small black rings at the intersections of the grid wires, organised in four squares, are the ferrite cores.
Project Whirlwind core memory
Close-up of a core plane. The distance between the rings is roughly 1 mm (0.04 in). The green horizontal wires are X; the Y wires are dull brown and vertical, toward the back. The sense wires are diagonal, colored orange, and the inhibit wires are vertical twisted pairs.
One of three inter-connected modules that make up an Omnibus-based (PDP 8/e/f/m) PDP-8 core memory plane
Bubble memory
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Bubble memory is a type of non-volatile computer memory that uses a thin film of a magnetic material to hold small magnetized areas, known as bubbles or domains, each storing one bit of data. The mate
Magnetic-core memory
…and could fix the problem. The procedure was seldom needed, as core memory proved to be very reliable compared to other computer components of the day. Bubble memory Core dump…
Intel 7110 magnetic-bubble memory module
Bubble domain visualization by using CMOS-MagView
Bubble memory by Texas Instruments. The label has hexadecimal numbers with the addresses of defective minor loops.
Bubble memory made in the USSR