IBM System/360 Model 30: Difference between revisions

Revision as of 07:32, 22 July 2019

Revision as of 14:15, 12 November 2019

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The Model 30 was a popular [[IBM mainframe]] announced in 1964 across the world as the then least powerful of the [[IBM System/360|System/360]]s – the first line of computers in the world to allow machine language programs to be written that could be used across a broad range of compatible sizes. It was the smallest model that had the full [[System/360]] instruction set (unlike the [[IBM System/360 Model 20|Model 20]]) and served as a stand-alone system, communications system or as a satellite processor of a larger system.<ref name="ibm-archives">{{cite web|title=IBM Archives: System/360 Model 30|url=https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP2030.html|website=IBM|accessdate=16 August 2016}}</ref>

The first delivery of the 360/30 was in June 1965 to [[McDonnell Aircraft]].<ref name=ibmbook>{{cite book|last1=Pugh|first1=Emerson W.|last2=Johnson|first2=Lyle R.|last3=Palmer|first3=John H.|title=IBM's 360 and early 370 systems|url=https://archive.org/details/ibms360early370s0000pugh|url-access=registration|date=1991|publisher=MIT Press|___location=Cambridge, Mass.|isbn=9780262161237}}</ref>

Along with the [[IBM System/360 Model 40|360/40]], these were the two largest revenue producing [[IBM System/360#Summary of models shipped|System/360 models]],<ref name=ibmbook/> accounting for over half the System/360 units sold.<ref>An [[Automatic Data Processing|ADP]] Newsletter cited on page 56 in {{cite book|last1=Weiss|first1=Eric A. (ed)|title=Computer Usage Essentials|date=1969|publisher=McGraw-Hill|lccn=71-76142}} shows sales of the 360 Model 30 (36%) and the Model 40 (22.6%), for a total of 58.6%</ref>

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===IBM 1620 emulation===

Although the 360/30 could be configured to emulate an [[IBM 1620]],<ref name="mod30-func-char"/>{{rp|p.11}} two factors made it less crucial than the above IBM 1400 series emulation:

* The [[IBM 1130]] was the preferred successor to the IBM 1620.<ref>{{cite book|title=Milestones in Computer Science and Information Technology|url=https://archive.org/details/milestonesincomp0000reil|url-access=registration|author=Edwin D. Reilly|year=2003|isbn=1573565210}}</ref><ref>{{cite book|title=History of Computer Graphics|author=Dan Ryan|isbn=1456751158|series=DLR Associates Series}}</ref>

* [[Fortran]] accounted for a significant part of how the 1620 was used,<ref>{{cite book|title=Basic Programming Concepts and The IBM 1620 Computer|author1=Daniel N. Leeson|author2=Donald L. Dimitry|year=1962|publisher=Holt, Rinehart and Winston}}</ref> and IBM 1620 Fortran programs could be converted to run on System/360.