Nord Programming Language

Short description: Procedural programming language

Nord Programming LanguageParadigm| Procedural, imperative

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Developer| Norsk Data
First appeared| 1974; 52 years ago (1974)
Final release|

Final

Typing discipline| Static, strong
Scope| Lexical
Platform| Norsk Data minicomputers
OS| Sintran III
License| Proprietary

Nord Programming Language (NPL), is a procedural programming language by the Norwegian minicomputer manufacturer Norsk Data. It shipped as a standard component of the operating system Sintran III.

The language was also used to implement Sintran III: the core and file system of which are written in NPL, as was the NPL compiler, and some core applications early on, until the release of high-level programming language named PLANC. Then, the linker and other software were rewritten in PLANC.

The NPL compiler was also special in that it did not emit object code as most compilers do. Instead it emitted an intermediate representation, in the form of assembly language code, which then had to be assembled using the Norsk Data Assembler.

The registers of the CPU were available in NPL as predefined variables. Thus could be written:

X + T =: A

and the compiler would emit:

COPY SX DA
RADD ST DA

Functions could be declared with multiple entry points:

FUNC FUN1, FUN2

FUN1: T := 1
FUN2:

code here

END

`FUN1` could be called to set `T` to `1` before falling into `FUN2` or `T` could be set to something else and call `FUN2`. If `T` register specified which file handle to write to, then either `FUN1` could be called to always output to terminal or `T` could be specified to handle a file in `T` and call `FUN2` to output to that file.

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Norsk Data

History|

* Benham Park
* Dietz Computer Systems
* Dolphin Server Technology
* FUNN
* Økernsenteret
* SAM
* Tandberg

Minicomputers|

* Nord-1
* Nord-5
* Nord-10
* Nord-50
* Nord-100
* ND-500
* ND-5000

Software|

* LED
* Ndix
* Notis
* Nord Programming Language
* Norsk Data Assembler
* Nord-TSS
* Nortext
* PED
* PLANC
* Sibas
* Sintran
* Sintran III

People|

* Tor Alfheim
* Per Bjørge
* Erik Engebretsen
* Kolbjørn Johansen
* Lars Monrad-Krohn
* Rolf Skår

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Original source: https://en.wikipedia.org/wiki/Nord Programming Language. Read more

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