IBM 7070

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IBM 7070 series exhibited in the Deutsches Museum Munich
IBM 7070 transistor board

The IBM 7070 was a data processing computer from IBM, which was presented by IBM in June 1960 . The 7070 series was the first transistor-based, programmable logic computer of the 700/7000 series from IBM.

The 7070 was developed as the transistorized successor to the IBM 650 , while the drum memory of the 650 was replaced with a much faster core memory . The 7070 was not instruction-compatible with the 650, which had the option of specifying a jump address for each instruction to optimize the use of the drum memory, which would have been unnecessary and wasteful for a computer with random core memory access . So an emulator was needed to run old programs.

The 7070 was also marketed as the successor to the IBM 705 . The serious incompatibilities that occurred, including the impossibility of completely mapping the character set of the 705, forced IBM to develop the IBM 7080 as a fully compatible "transistorized IBM 705".

The data format used consisted of words consisting of 10 decimal digits plus a sign . The digits were stored in the two out of five code. The core memory size of the machines delivered could be between 5,000 and 9,990 words. The computing speed of the CPU was 27  kIPS . The monthly rental price of a typically equipped system was $ 17,400 and the purchase price was $ 813,000.

Later presented computers of this series were the IBM 7072 , introduced in November 1962 , and the IBM 7074 (November 1961 ), one of which is exhibited today in the Deutsches Museum in Munich.

The successor was the System / 360 , which was introduced by IBM in 1964.

credentials

  1. ↑ Emerson W. Pugh, Lyle R. Johnson, John H. Palmer, IBM's 360 and early 370 systems , MIT Press, 1991, ISBN 0262161230 , p. 50

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