IBM magnetic core memory comprising 3 dimensional network of wires with magnetic beads at each intersection, together with a plug-in module, 1950s-1960s.
Module with six frames, each containing a number of tiny magnetic toroids (rings), the cores, through which wires are threaded to write and read information. The top is protected by a perspex sheet and the base of the module is attached to a metal plate. A set of seven cord connectors is attached to the frames. Plug in module containing mechanical and electromechanical components. Some of the components have identifying markings.
Magnetic core memory was the electro-physical mainstay of computers in the early computer era. They had to be hand-assembled.
Donation from IBM Australia Pty Ltd, 21/03/1996
Top of module with magnetic core: 002 / AC Plug in module: (text)
Type of item
234 mm (Length), 230 mm (Width), 110 mm (Height)
Dimensions of magnetic core.
140 mm (Length), 175 mm (Width), 25 mm (Depth)
Dimensions of plug in module.