A look at IBM S/360 core memory: In the 1960s, 128 kilobytes weighed 610 pounds

A look at IBM S/360 core memory: In the 1960s, 128 kilobytes weighed 610 pounds

Each plane had a separate sense line to read that bit.7 The IBM core stack below stored a 16-bit word along with two parity bits, so there were 18 core planes. To summarize, a typical core memory plane had four wires through each core: X and Y drive lines, a sense line, and an inhibit line. Each core plane in this memory array was rectangular, with 130 Y drive lines and 256 X drive lines.

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