NORD-20

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The NORD-20 is almost identical with the NORD-2B. Compared to later models of NORD-2B the NORD-20 is electrically the same but the CPU is contained on six boards instead of ten.[1] It is smaller physically than the NORD-10[2]. The NORD-20 was released before the NORD-10.

NORD-20 in an office settings with ASR-33 terminal, Centronics printer, Facit 4070 punch and a card reader

First installed system in January 1972. In August 1974 a total of 43 systems had been installed[3].

The NORD-20 was introduced in 1971. This computer provides very fast interrupt handling and is very well suited for data communications, multi-computer applications and process control.[4]

Comparision with NORD-10

The following comparision was made in August 1973.[5]

NORD-10 NORD-20
Cycle time 0.4-0.8 us 1.0 us
Word length 16 16
Memory size 8-256 kWord 4-16 kWord
Price basic system 200.000 NOK 78.000 NOK
Price for typical system 2.000.000 NOK 500.000 NOK

Remaining machines

This is a first shot at a list of remaining machines. Also machines that is known to be lost will be listed to make it easier to locate remaining ones. We don't have any production numbers yet.

  • NORD-20 with unknown serial is in the collection of Trøim, in Telemuseums storage in Fetsund (2016 inventory).

References

  1. ND-Nytt #7, May 1973 page 20-21.
  2. Picture in the collections of Oslo Museum
  3. Computers and People, September 1974
  4. Norsk Data library, Software Nord-10 Design Goals (TSS-02)
  5. Computer manufacturing survey from 1973