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This IBM antique is an original hand made computer core memory card for the 2821 printer. Included is the very rare and seldom found logic board that controlled each of the core memory boards. These were used on the 1401 and 360 computers. Note that these were the last of the large ferrite cores, hand made core memory cards of the 1950s to 1960s. The card has 1600 bits in 16 quadrants each in 10 rows of ferrite cores. Note too, that contacts were a high quality of gold contacts. This is a very nice display of a 1965 IBM 1401 Computer Core Memory with very large cores (IBM started production of the 1401 in 1961) and Logic Card. These were removed from a genuine IBM 1401 before machine was scrapped. The 1401 Core memory card has 16 rows of large core. The decision logic card has matching electronic plugs and 10 IBM secret supporting electronics (IBM secret boxes stamped “483185 & 701952”). The 1401 came standard with 4K of core memory. It could be expanded to a whopping 16K. As technology matured, the memory cores began to get smaller to pack more memory on a board. Size is 4.5” on each board. These rare treasures came from the main 1401 processor and printer buffer. This is a beautiful display of old computer technology and seldom found from 40+ years ago.
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