NORD-20: Difference between revisions

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Little is known about the '''NORD-20'''. It seems to be a slimmed down [[NORD-10]] as it is smaller physically than the NORD-10<ref name="picture">[http://digitaltmuseum.no/021015466860 Picture in the collections of Oslo Museum]</ref>. The NORD-20 was released before the NORD-10.
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.<ref>[https://drive.google.com/open?id=0B2Sc5Qa5d_tLM0hmVUxHekcyUUU ND-Nytt #7, May 1973] page 20-21.</ref> It is smaller physically than the NORD-10<ref name="picture">[http://digitaltmuseum.no/021015466860 Picture in the collections of Oslo Museum]</ref>. The NORD-20 was released before the NORD-10.
[[Image:NORD-20-office.jpg |300px | thumb | NORD-20 in an office settings with [[ASR-33]] terminal, Centronics printer, [[Facit 4070]] punch and a card reader]]
[[Image:NORD-20-office.jpg |300px | thumb | 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<ref name="CnP">Computers and People, September 1974</ref>.
First installed system in January 1972. In August 1974 a total of 43 systems had been installed<ref name="CnP">Computers and People, September 1974</ref>.
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.<ref>[http://sintran.com/sintran/library/libsw/NORD-10-Design-Goals.pdf Norsk Data library, Software Nord-10 Design Goals (TSS-02)]</ref>


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

Latest revision as of 14:44, 21 October 2019

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