Advances in memory push a revolution

摘要

Sometime in 1972 a digital item was created. Let's say an employee worked 8 hour; that day and so the number 8 was carefully placed into 16 bits of a core memory. This core memory was someplace inside a mainframe or minicomputer with an IBM or DEC or Honeywell label on its front panel. Core memory had some wire wrapped around a tiny donut shaped thing that held one bit. It was driven by transistors in a TTL logic IC that pulled current through the wires and a single card full of core held 32 Kbytes.