Jnc: +cat

2018-12-19T23:50:00Z

+cat

Jnc: An OK start

2018-10-05T22:03:19Z

An OK start

New page

The '''Standard Modular System''' ('''SMS''') was a [[circuit]] packaging system developed by [[International Business Machines|IBM]]. Developed in early 1958, it was initially used in [[IBM 7030 Stretch|Stretch]], and in machines of the [[IBM 7000 series]] (the first use was in the [[IBM 7090]], first shipped in December, 1959).

Although IBM had developed standard 8-[[vacuum tube|tube]] [[Architecture#Architectural techniques|module]]s for the [[IBM 700 series]], due to lax control over the creation of new types, there were eventually over two thousand different types of these modules used in the 700 series. There was also a desire for automated production of modules, for cost reasons; machinery was developed to insert components in [[printed circuit board|PCBs]].

After some internal debate. SMS was proposed, with cards of 2-1/2" by 4-1/2", with gold-plated contact fingers on one side of the card, which was to be inserted in a [[backplane]], which used spring-loaded phosphor-bronze contacts. (So called 'two-wide' cards, double the width, were used in some machines, such as Stretch.) [[Wire-wrap]] was used to interconnect the pins in the backplane.

SMS was used in all IBM computers until the [[Solid Logic Technology]] system used in the [[IBM System/360]] was developed in 1964; but even then, SMS continued to be very widely used in less demanding applications, such as [[peripheral]]s.

{{semi-stub}}

← Older revision		Revision as of 23:50, 19 December 2018
Line 8:		Line 8:

	{{semi-stub}}		{{semi-stub}}
		+
		+	[[Category: IBM]]

Standard Modular System - Revision history

Jnc: +cat

Jnc: An OK start