D2 was a concept and prototype computer designed by Datasaab in Linköping, Sweden. It was built with discrete transistors and completed in 1960. Its purpose was to investigate the feasibility of building a computer for use in an aircraft to assist with navigation, ultimately leading to the design of the computer used in Saab 37 Viggen. This military side of the project was known as SANK, or Saabs Automatiska Navigations-Kalkylator (Saab's Automatic Navigational-Calculator), and D2 was the name for its civilian application. The D2 is on exhibit at , the computer museum in Linköping, Sweden.
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| - Datasaab D2 (en)
- Datasaab D2 (it)
- データサーブ D2 (ja)
- Datasaab D2 (sv)
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| - D2 fu un progetto e un prototipo di computer realizzato da a Linköping, Svezia. (it)
- データサーブ D2（Datasaab D2）は、スウェーデン、リンシェーピングのデータサーブ社が設計した試作コンピュータである。 (ja)
- D2 was a concept and prototype computer designed by Datasaab in Linköping, Sweden. It was built with discrete transistors and completed in 1960. Its purpose was to investigate the feasibility of building a computer for use in an aircraft to assist with navigation, ultimately leading to the design of the computer used in Saab 37 Viggen. This military side of the project was known as SANK, or Saabs Automatiska Navigations-Kalkylator (Saab's Automatic Navigational-Calculator), and D2 was the name for its civilian application. The D2 is on exhibit at , the computer museum in Linköping, Sweden. (en)
- D2 var det civila namnet på den första transistorerade digitala dator som byggdes på Datasaab. Modellen gick aldrig i produktion, men utgjorde prototypen och grunden för hela företagets verksamhet under 1960- och 1970-talet, såväl satsningen på civila mini- och stordatorer D21, D22, D23 och D5 som på digitala transistorierade datorer för militära flygplan (CK 37). Det senare får förmodas vara huvudsyftet, medan den civila linjen var mer av en spinoff. (sv)
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| - D2 was a concept and prototype computer designed by Datasaab in Linköping, Sweden. It was built with discrete transistors and completed in 1960. Its purpose was to investigate the feasibility of building a computer for use in an aircraft to assist with navigation, ultimately leading to the design of the computer used in Saab 37 Viggen. This military side of the project was known as SANK, or Saabs Automatiska Navigations-Kalkylator (Saab's Automatic Navigational-Calculator), and D2 was the name for its civilian application. The D2 weighed approximately 200 kg, and could be placed on a desktop. It used words of 20 bits corresponding to 6 decimal digits. The memory capacity was 6K words, corresponding to 15 kilobytes. Programs and data were stored in separate memories. It could perform 100,000 integer additions per second. Paper tape was used for input. Experience from the D2 prototype was the foundation for Datasaab's continued development both of the civilian D21 computer and military aircraft models. The commercial D21, launched already in 1962, used magnetic tape, 24 bit words, and unified program and data memory. Otherwise it was close to the D2 prototype, while a working airborne computer required a lot more miniaturization. The D2 is on exhibit at , the computer museum in Linköping, Sweden. (en)
- D2 fu un progetto e un prototipo di computer realizzato da a Linköping, Svezia. (it)
- データサーブ D2（Datasaab D2）は、スウェーデン、リンシェーピングのデータサーブ社が設計した試作コンピュータである。 (ja)
- D2 var det civila namnet på den första transistorerade digitala dator som byggdes på Datasaab. Modellen gick aldrig i produktion, men utgjorde prototypen och grunden för hela företagets verksamhet under 1960- och 1970-talet, såväl satsningen på civila mini- och stordatorer D21, D22, D23 och D5 som på digitala transistorierade datorer för militära flygplan (CK 37). Det senare får förmodas vara huvudsyftet, medan den civila linjen var mer av en spinoff. D2-projektets militära namn var Sank, Saabs automatiska navigeringskalkylator. Denna var ursprungligen inpspirerad av en navigationsdator för Robot 330 men hade modifierats för att ersätta den mänskliga navigatören i efterföljare till attackplanet Saab 32 Lansen, då man nu såg att nyare attackflygplan skulle bli ensitsiga. D2 konstruerades under ledning av och stod färdig 1960. Det enda exemplaret av D2 finns utställt på Tekniska museet i Stockholm. D2 hade åtskilda minnen för program ("order") och data (så kallad Harvardarkitektur), något som avskaffades i D21 (där man vände till Von Neumann-arkitekturen). Ordlängden var 20 bitar, vilket motsvarar sex decimala siffror. Minnet rymde 6K ord (120 kbit, motsvarande 15 kByte). D2 kunde utföra 100 000 additioner per sekund av sådana heltal. (sv)
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