The first non-volatile memory that was widely used. Core storage held magnetic charges in tiny ferrite cores, and the direction of the flux determined the 0 or 1. Developed in the late 1940s by Jay W.

If you want read-only memory today, you might be tempted to use flash memory or, if you want old-school, maybe an EPROM. But there was a time when that wasn’t feasible. [Igor Brichkov] shows us how to ...

If you’ve heard of core rope memory, it will probably be in the context of vintage computing equipment such as Apollo-era NASA hardware. A string of magnetic cores and sense wires form a simple ROM ...