NORD-20: Difference between revisions
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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.<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 || | | Cycle time || 0.4-0.8 us || 1.0 us | ||
|- | |- | ||
| Word length || 16 || 16 | | Word length || 16 || 16 | ||
|- | |- | ||
| Memory size || | | Memory size || 8-256 kWord || 4-16 kWord | ||
|- | |- | ||
| Price basic system || | | Price basic system || 200.000 NOK || 78.000 NOK | ||
|- | |- | ||
| Price for typical system || | | 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
- ↑ ND-Nytt #7, May 1973 page 20-21.
- ↑ Picture in the collections of Oslo Museum
- ↑ Computers and People, September 1974
- ↑ Norsk Data library, Software Nord-10 Design Goals (TSS-02)
- ↑ Computer manufacturing survey from 1973
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