Wikipedia

IBM System/360 Model 30: Difference between revisions

Browse history interactively
← Previous edit
Content deleted Content added
VisualWikitext
Update link. Use the Wayback Machine for that now-dead link.
→History: I guess this is the closest thing to that section.
 
(5 intermediate revisions by 4 users not shown)
Line 54:
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>
 
Along with the [[IBM System/360 Model 40|360/40]], these were the two largest revenue producing [[IBM System/360#SummaryTable of modelsSystem/360 shippedmodels|System/360 models]],<ref name=ibmbook/> accounting for over half the System/360 units sold.<ref>An [[Automatic Data Processing|ADP]] Newsletter cited on page 56 in {{cite book|editor-last1=Weiss|editor-first1=Eric A. |title=Computer Usage Essentials|date=1969|publisher=McGraw-Hill|lccn=71-76142}} shows sales of the 360 Model 30 (36%) and the Model 40 (22.6%), for a total of 58.6%</ref>
 
==Models==
Line 70:
 
==Microcode==
The Model 30 [[CPU]] used an 8-bit [[microarchitecture]] with only a few [[hardware register]]s; everything that the programmer saw was
[[Emulator|emulated]] by the [[microprogram]].<ref name="30theory">{{cite book|url=http://bitsavers.org/pdf/ibm/360/fe/2030/Y24-3360-1_2030_FE_Theory_Opns_Jun67.pdf|title=Field Engineering Theory of Operation, 2030 Processing Unit, System/360 Model 30|id=Y24-3360-1|edition=Fifth|date=June 1967|publisher=IBM}}</ref><ref>{{cite book|url=http://bitsavers.org/pdf/ibm/360/fe/2030/Model_30_Microprogramming_Lang.pdf|title=Model 30 Microprogramming Language|publisher=IBM}}</ref> Handling a 4-byte word took (at least) 6 microseconds, based on a 1.5 microsecond storage access cycle time.<ref name="30theory"/>{{rp|pg.1–4}}
 
Line 112:
TOS [[TOS/360|(Tape Operating System)]], as the name suggests, required a tape drive but no disk. It shared most of the code base<ref name=40Y.mem>{{cite newsgroup|url=https://groups.google.com/d/msg/alt.folklore.computers/RZA6FD27Tc0/-LoIXsOee7gJ|title=DOS/360: Forty years|author=Joe Morris|newsgroup=alt.folklore.computer|date=April 25, 2005|quote=Don't forget TOS, the bastard cousin of DOS. Either could be generated from the same set of distribution libraries...}}</ref> and some manuals<ref>{{cite web|url=http://www.bitsavers.org/pdf/ibm/360/dos/GC24-5030-8_Disk_and_Tape_Operating_Systems_Concepts_and_Facilities_Oct70.pdf|title=IBM System/360 Disk and Tape Operating Systems Concepts and Facilities|date=October 1970|id=GC2ij-5030-8}}</ref><ref>{{cite web|url=http://www.bitsavers.org/pdf/ibm/360/dos/GC24-3465-8_DOS_and_TOS_Utility_Programs_R26.1_Aug73.pdf|title=DOS and TOS Utility Programs|date=August 1973|id=GC24-3465-8}}</ref> with IBM's DOS/360 and went through 14 releases. TOS was discontinued<ref>{{cite mailing list|url=https://www.mail-archive.com/ibmvm@listserv.uark.edu/msg24371.html|author=Anne and Lynn Wheeler|title=Re: IBM 1401|date=May 28, 2009|mailing-list=ibmvm@listserv.uark.edu}}</ref>{{failed verification|date=January 2020}} when disk drives became more affordable.<ref>Computerworld, Sept. 5, 1977, p.40 - quotes an IBM task force report that referred to "price alone rather than by price/performance."</ref>
 
DOS [[DOS/360|(Disk Operating System)]] was a popular choice for the 360/Model 30.<ref>Of those 360/Model 30 and 360/Model 40 machines still around in 1981/being replaced by 4300 systems, a Computerworld survey showed that DOS was what they ran/had run, May 25, 1981, p. 26</ref><ref>{{cite web|url=http://www.edwardbosworth.com/My3121Textbook_HTM/MyText3121_Ch03_V01.htm|title=Programming Assembler Language on the IBM Mainframes: An Introduction|at=Chapter 3 – The Heritage of the IBM System/360|author=Edward L. Bosworth}}</ref><ref>{{cite web|url=http://ed-thelen.org/comp-hist/ibm-360-30.html|title=IBM System 360, Model 30|author=Ed Thelen}}</ref><ref>{{cite web|url=http://www.highersystems.co.uk/ibm_360_30.html|title=IBM 360/30|access-date=2016-10-05|archive-date=2016-07-07|archive-url=https://web.archive.org/web/20160707135313/http://highersystems.co.uk/ibm_360_30.html|url-status=dead}}</ref>
 
Amazingly<ref group='NB'>The source cited prefixes its statement with "Amazing fact:"</ref> the smaller BOS had a [[Spoolingspooling]] system for queued printing,<ref>{{cite book |last1=IBM Corporation |title=IBM System/360 Basic Programming Support and IBM Basic Operating System/360 Programming Systems Summary |date=1965 |url=https://bitsavers.org/pdf/ibm/360/bos_bps/C24-3420-0_BPS_BOS_Programming_Systems_Summary_Aug65.pdf |access-date=June 15, 2024}}</ref>{{rp|p.9}} whereas DOS did not<ref name="DeMorton"/>{{rp|page 18}} until the arrival in the late 1960s of "an add-on component called POWER."<ref name="DeMorton"/>{{rp|page 16}}
 
==Programming languages==
Retrieved from "https://en.wikipedia.org/wiki/IBM_System/360_Model_30"