Standard Modular System: Difference between revisions

Revision as of 18:33, 6 July 2013

Revision as of 22:04, 25 November 2013

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[[File:SMS card from IBM 1401.agr.JPG|thumb|SMS card from a 1401]]

[[File:SMS card with power transistors.agr.jpg|thumb|Another 1401 SMS card, this one with power transistors. It was used to drive print hammers on an [[IBM 1403]] line printer.]]

The '''Standard Modular System (SMS)''' was a system of standard [[transistor]]ized circuit boards and mounting racks developed by [[IBM]] in the late 1950s, originally for the [[IBM 7030 Stretch]].<ref>{{Citationcite web|url=http://www.computer-museum.ru/books/archiv/ibm36040.pdf#page=18|title=The 360 Revolution|last=Boyer|first=Chuck needed|date=MayApril 2004|publisher=IBM|pages=18|accessdate=25 November 20102013}}</ref> They were used throughout IBM's second generation computers, peripherals, the [[IBM 700/7000 series|7000 series]], the [[IBM 1400 series|1400 series]], and the [[IBM 1620|1620]]. SMS was superseded by [[Solid Logic Technology]] (SLT) introduced with [[System/360]] in 1964, however they remained in use with legacy systems through the 1970s.

Many IBM peripheral devices that were part of System/360, but were adapted from second-generation designs, continued to use SMS circuitry instead of the newer SLT. These included the 240x-series tape drives and controllers, the 2540 card reader/punch and 1403N1 printer, and the 2821 Integrated Control Unit for the 1403 and 2540. A few SMS cards used in System/360 peripheral devices even had SLT-type hybrid IC's mounted on them.

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*[http://members.optushome.com.au/intaretro/SMSCards.htm IBM's Standard Modular System (SMS) cards]

*http://ibm-1401.info/index.html

** http://ibm-1401.info/IBM-StandardModularSystem-Neff7.pdf

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