For those who don't know, each core represented a 0 bit or a 1 bit. That's why they were called bi-stable ferromagnetic cores. You needed 3 cores for one byte. (??) Power would flip the magnetism of each either one way or the other representing the 0 or 1. The oblique sense lines would sense what the state was. If I recall correctly, each "read" required a subsequent re-write. However, if the machine was powered down, the cores would retain their memory. I worked on crypto machine where the cores operated like flip-flops and actually ran the machine in addition to memory. Amazing technology of the time although we still work with binary operation. Its just the "cores" that are different.
