Magnetic-Core Memory

COINCIDENT-CURRENT · FERRITE HYSTERESIS · c. 1953

ADDRESS MATRIX X3 · Y4

click a cell to address it · X = column, Y = row

LOAD MEMORY

WRITE / READ

IDLE

MEMORY BUSIDLE

ADDRESSX3 · Y4011 · 100

DATA—

X3Y4INHIBITSENSE

HYSTERESIS LOOPB vs H

SENSE AMPLIFIER

stored 1 · +Br ↻ stored 0 · −Br ↺ half-select · holds

Run the demo, then address a core · drag to orbit · ⌘/Ctrl + scroll to zoom