IBM System/370 Model 148: Difference between revisions

Browse history interactively

Content deleted Content added

VisualWikitext

Revision as of 06:52, 24 May 2018 edit Pi314m (talk \| contribs) Extended confirmed users 15,149 edits →initial article		Latest revision as of 03:04, 26 December 2024 edit undo Maxymczech (talk \| contribs) Extended confirmed users 511 edits mNo edit summary
(23 intermediate revisions by 14 users not shown)
Line 1: {{Infobox information appliance \| name = IBM System/370 Model 148 \| title = \| aka = \| logo = File:IBM logo.svg▼ ~~\| aka =~~ \| image = IBM System370 model 148 (I197911).jpg ▲\| logo = File:IBM logo.svg \| caption = IBM System/370 Model 148▼ ~~\| image =~~ \| developer = ▼ ▲\| caption = IBM System/370 Model 148 ▲\| developer = \| manufacturer = International Business Machines Corporation ([[IBM]]) \| family = [[System/370]] \| generation = \| releasedate = {{Start date\|1976\|06\|30}} \| lifespan = \| price = \| discontinued = November 1, 1983 \| unitssold = \| unitsshipped = \| media = \| os = \| os power = \| ~~power~~ soc = \| ~~soc~~ cpu = \| memory = One or two megabytes of high-density integrated monolithic processor storage▼ ~~\| cpu =~~ \| storage = ▲\| memory = One or two megabytes of high-density integrated monolithic processor storage \| ~~storage~~ memory card = \| ~~memory card~~ display = \| ~~display~~ graphics = \| ~~graphics~~ sound = \| ~~sound~~ input = \| ~~input~~ controllers = \| ~~controllers~~ camera = \| ~~camera~~ touchpad = ~~\| touchpad =~~ \| connectivity = \| platform = \| service = \| dimensions = \| weight = \| topgame = \| compatibility = \| predecessor = \| successor = \| related = \| image_size = 270px ~~\| website = {{Official website\|https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3168.html}} ''IBM Archives''}}~~ }} The '''IBM System/370 Model 148''' (and the '''Model 138)'''<ref name=IBMarc.138>{{cite web \|url=https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3138.html \|archive-url=https://web.archive.org/web/20050311002150/http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3138.html \|title=System/370 Model 138\|website=IBM Archives\|publisher=IBM}}</ref>)were both announced June 30, 1976<ref name=IBMarc.148>{{cite web▼ \|url-status=dead \|archive-date=March 11, 2005 ▲\|title=System/370 Model 138\|website=IBM Archives\|date=23 January 2003\|publisher=IBM}}</ref>) were both announced June 30, 1976<ref name=IBMarc.148>{{cite web \|url=https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3148.html \|archive-url=https://web.archive.org/web/20050311002817/http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3148.html \|title=System/370 Model 148\|website=IBM Archives\|publisher=IBM}}</ref>▼ \|url-status=dead \|archive-date=March 11, 2005 ▲\|title=System/370 Model 148\|website=IBM Archives\|date=23 January 2003\|publisher=IBM}}</ref> Not only were they both more powerful and better in price/performance than ~~their~~the ~~virtualized<ref>135-3,~~IBM System/370 Model 145 with a 3145-3< CPU and the IBM System/~~ref>~~370 ~~counterparts,~~Model ~~but~~135 ~~actually~~with ~~much~~a 3135-3 CPU, respectively, but lower in price.<ref name=CW.jump/><ref>$350,000 for a 138 having 500K of memory, vs. $721,500 for a 135-3 with 500K - less than half the price!</ref> The 148 and 138,<ref>described as "medium-powered System/370 computers" {{cite news The 148 and 138, both of which were withdrawn November 1, 1983, were marketed as followups for those wishing to upgrade, respectively, their [[IBM System/370 Model 145\|370/145]] and [[IBM System/370 Model 135\|370/135]] systems.▼ \|newspaper=[[The New York Times]] \|url=https://www.nytimes.com/1978/03/02/archives/ibm-cutting-prices-20-on-2-computers.html \|title=I.B.M. Cutting Prices 20% on 2 Computers ▲~~The~~ ~~148~~ ~~and~~ ~~138~~\|date=March 2, 1978}}</ref> both of which were withdrawn November 1, 1983, were marketed as followups for those wishing to upgrade, respectively, their [[IBM System/370 Model 145\|370/145]] and [[IBM System/370 Model 135\|370/135]] systems. ==Expanded capabilities== The 148 had four times the ''reloadable [[Control store\|control storage]]'' of the 145,<ref>128K vs. 32K</ref> enabling or enhancing features such as: * ''[[APL (programming language)\|APL]] Assist''<ref>a ~~Microcode~~microcode-based feature that ~~allowe~~allowed for faster execution than a software-only approach.</ref> * ''[[Extended ~~control~~Control ~~program~~Program ~~support~~Support]]'' - going beyond the language-specific APL Assist, this had wider scope, reducing CPU cycles needed to run the operating system.<ref>up to 20% for OS/VS1, up to 55% for VM/CMS.</ref> The 3148 (and the 3138) had a built in service processor, aka known as an IOC, this service processor could directly attach a 3203 printer. The IOC also drives an [[IBM 3277]] display console, whereas the older 3145 used an [[IBM 3215]] typewriter console. A new model of the IBM 3203 printer family, the Model 4, was announced. Rated at 1200 Lines/Minutes, it was intended to provide already-available 1200 LPM printing, but in a more compact form.▼ ▲A new model of the IBM 3203 printer family, the Model 4, was announced. Rated at 1200 ~~Lines~~lines/~~Minutes~~minute (LPM), it was intended to provide already-available 1200 LPM printing, but in a more compact form. ==Field upgrades== Line 64 ⟶ 77: https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/477654?Firmware-upgrade-in-the-filed-TMS320F2837xS-Delfino-Microcontrollers</ref> IBM could upgrade a 370/145 that had been field-upgraded to a 145-2, resulting in a 145-3. This was a major accomplishment, compared to what is known as a "forklift upgrade" - out with the old, in with the new, often consuming valuable time.<ref>{{cite web \|url=https://www.computerworld.com/article/3058252/data-storage/how-to-overcome-the-infamous-forklift-upgrade-challenge.html \|title=How to overcome the infamous forklift upgrade challenge {{!}} Computerworld \|website=www.computerworld.com \|url-status=dead \|archive-url=https://web.archive.org/web/20160419032058/http://www.computerworld.com/article/3058252/data-storage/how-to-overcome-the-infamous-forklift-upgrade-challenge.html \|archive-date=2016-04-19}} </ref> <ref>{{Cite web\|url=https://www.pcmag.com/encyclopedia/term/68928/forklift-upgrade\|title = Definition of forklift upgrade}}</ref> ==Marketing considerations== An industry research firm said "may be described as early 380s programmed to act like 370s"<ref name=CW.jump>{{cite ~~newspaper~~news \|newspaper=Computerworld \|title=IBM 370/138, 148 Really 'Early 380s'? Users May Have Jump on Upgrades Line 85 ⟶ 98: {{DEFAULTSORT:IBM System 370 Model 148}} ~~[[Category:IBM computers]]~~ [[Category:IBM System/360 mainframe line]] [[Category:Computer-related introductions in 1976]]