NORD-20
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.
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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