IBM System/360 Model 30: Difference between revisions

Revision as of 17:46, 29 March 2022

Revision as of 05:36, 8 December 2022

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==History==

The Model 30 was a popular [[IBM mainframe]] which was announced in 1964 as the least powerful of the [[IBM System/360|System/360]]s. The System/360 series was 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 machines of different 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|date=23 January 2003 |access-date=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>

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==Compatibility features==

The ability to continue running programs designed for earlier systems was crucial to selling new hardware.<ref>{{cite book|title=The Technical and Social History of Software Engineering|author=Capers Jones|date=21 November 2013 |isbn=0133365891978-0133365894}}</ref> Although the instruction set of System/360 was not [[Backward compatibility|backward compatible]] with earlier systems,<ref>Computerworld, April 24, 1989, page 1</ref> IBM provided [[emulator]]s for the earlier systems.

===IBM 1400 series emulation===