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in the IBM 7302 was heated/cooled to stabilize its operating characteristics. Early units immersed the core stack in heated/cooled oil. Later units, called the IBM 7302A, blew heated/cooled air through the core stack. The use of smaller cores in the IBM 7302A allowed the cycle time to be reduced to
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The IBM 7094 II used this as 32,768 – 36-bit words. Because the Even 36-bit word and Odd 36-bit word were independent in this model their accesses could overlap, which could reduce effective cycle time to
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The IBM 7030 used this as 16,384 – 64-bit words and an 8-bit ECC. Interleaving of units could reduce effective cycle time to 1.09μs (two unit groups) or 0.545μs (four unit groups).
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The IBM 7030 used this as 8,192 – 64-bit words and an 8-bit ECC. Interleaving of units could reduce effective cycle time to 1.09μs (two unit groups) or 0.545μs (four unit groups).
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The IBM 7094 used this as 32,768 – 36-bit words. Instructions were fetched in 72-bit word pairs, reducing effective instruction fetch time to 1.0μs.
27:(Stretch). The IBM 7030 could use from one to sixteen IBM 7302s (typically six); either individually or in interleaved groups of two or four. The
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2.0μs for the IBM 7094. The use of even smaller cores in the IBM 7302 Model 3 allowed the cycle time to be reduced to 1.4μs for the IBM 7094 II.
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also used one decimal model IBM 7302 with a different core stack than used in the binary models.
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16,384 – 72-bit words w/ 2.18μs cycle time (IBM 7302A 2.0μs cycle time)
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used one IBM 7302, but it was a new model unique to the IBM 7094 II. The
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The IBM 7080 used this as 160,000 – 7-bit characters; CBA8421.
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The IBM 7080 used this as 80,000 – 7-bit characters; CBA8421.
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160,000 – 7-bit characters w/ 2.18μs cycle time
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Storage unit was designed in 1957–1958 for the
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