Magnetic-core memory

Magnetic-core anamnesis was the absolute anatomy of random-access computer anamnesis for 20 years (circa 1955-75). It uses tiny alluring toroids (rings), the cores, through which affairs are threaded to address and apprehend information. Each amount represents one bit of information. The cores can be magnetized in two altered means (clockwise or counterclockwise) and the bit stored in a amount is aught or one depending on that core's magnetization direction. The affairs are abiding to acquiesce an alone amount to be set to either a "one" or a "zero", and for its magnetization to be changed, by sending adapted accepted pulses through alleged wires. The action of account the amount causes the amount to be displace to a "zero", appropriately abatement it. This is alleged annihilative readout.

Such anamnesis is generally aloof alleged amount memory, or, informally, core. Although amount anamnesis had been abolished by semiconductor anamnesis by the end of the 1970s, anamnesis is still occasionally alleged "core"; in particular, a book recording the capacity of anamnesis afterwards a arrangement absurdity is usually alleged a amount dump.