IBM System/360 Model 67: Difference between revisions

Revision as of 21:53, 3 April 2022

Revision as of 22:23, 3 April 2022

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The unique features of the S/360-67 were initially ''not'' carried into IBM's next product series, the [[System/370]], although the [[IBM System/370 Model 145|370/145]] had an [[Content-addressable memory|associative memory]] that appeared more useful for paging than for its ostensible purpose.<ref name=SY24-3581>{{cite manual

| url = http://www.bitsavers.org/pdf/ibm/370/fe/3145/SY24-3581-1_3145_Processing_Unit_Theory-Maintenance_Oct71.pdf

| title = IBM Maintenance Library 3145 Processing Unit Theory - Maintenance

| id = SY24-3581-21

| authorpublisher = IBM

}}{{rp|CPU 117–1292{{hyp}}117–2{{hyp}}129}}</ref> This was largely fallout from a bitter and highly visible political battle within IBM over the merits of [[time-sharing]] versus [[batch processing]]. Initially at least, time-sharing lost.

However, IBM faced increasing customer demand for time-sharing and virtual memory capabilities. IBM also could not ignore the large number of S/360-67 time-sharing installations &ndash; including the new industry of [[time-sharing]] vendors, such as [[National CSS]]<ref>[http://www.computerhistory.org/corphist/documents/doc-42ae226a5a4a1.pdf "A technical history of National CSS"], Harold Feinleib, Computer History Museum (March 2005)</ref><ref>[http://www.computerhistory.org/corphist/documents/doc-422fd82791f26.pdf "From the very beginning... from my vantage point — early history of National CSS"], Dick Orenstein, Computer History Museum (January 2005)</ref> and [[Interactive Data Corporation]] (IDC),<ref>Varian, op. cit., pp. 24, Note 76 – IDC systems (quoting Dick Bayles)</ref> that were quickly achieving commercial success.