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http://en.wikipedia.org/wiki/File:KL_Kernspeicher_Makro_1.jpg. Only when the other ½ needed is the ring magnetised. ½ the current needed to magnetise the ferrite ring. http://en.wikipedia.org/wiki/File:KL_Kernspeicher_Makro_1.jpg.
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http://en.wikipedia.org/wiki/File:KL_Kernspeicher_Makro_1.jpghttp://en.wikipedia.org/wiki/File:KL_Kernspeicher_Makro_1.jpg
Only when the other ½ needed is the ring magnetised ½ the current needed to magnetise the ferrite ring http://en.wikipedia.org/wiki/File:KL_Kernspeicher_Makro_1.jpg
A 10.8×10.8 cm card of core memory of 32x32= 1024 bits, as used in a CDC 6600 Originally all made by hand
1nm 1mm 10-9 m 10-2 m 1/10,000,000 = 10-7 So it should be possible to create a molecular memory with a density 1014x greater
March 4, 1956 An Wang Sells Core Memory Patent to IBM An Wang sells his patent for ferrite core memory to IBM for $500,000. One of the most important inventions in computer history, ferrite core memory was widely used in digital computers from the mid-1950s until the mid-1970s. The U.S. Patent Office awarded Wang the patent for what he called a pulse transfer controlling device in 1949. Jay Forrester at MIT is considered the inventor of core memory. Harry Kroto 2004
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