Difference between revisions of "Template:Mainframe I/O access methods"
imported>Guy Harris (Put "OS/360 and successors" in the title - some of the access methods listed weren't in OS/360 but were in various successors.) |
imported>Guy Harris (→All the previous article like texts: Note that it's "and successors", and list the successors. Also note that some access methods are for telecommunications networks rather than data sets.) |
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''cleanup: This is not an article! All the article-like stuff is to be moved, i.e. to the [[Access method]] article: All the intro paragraphs as well as all the latter chapters.'' | ''cleanup: This is not an article! All the article-like stuff is to be moved, i.e. to the [[Access method]] article: All the intro paragraphs as well as all the latter chapters.'' | ||
| − | The '''OS/360 I/O access methods''' are programming [[Application programming interface|API]]s on the [[OS/360]] [[mainframe computer]] [[operating system]], used by programmers to implement input/output operations on [[Data set (IBM mainframe)|data sets]] (files). They are by convention referenced to with ''...AM'' acronyms, standing for ''... Access Method'' | + | The '''OS/360 and successors I/O access methods''' are programming [[Application programming interface|API]]s on the [[OS/360]] [[mainframe computer]] [[operating system]] and its [[OS/360 and successors|successors]], such as [[OS/VS1]], [[OS/VS2 (SVS)]], [[MVS]], [[OS/390]], and [[z/OS]], used by programmers to implement input/output operations on [[Data set (IBM mainframe)|data sets]] (files) and [[telecommunications network]]s. They are by convention referenced to with ''...AM'' acronyms, standing for ''... Access Method''. |
== Including EXCP, EXCPVR and STARTIO in a separate class == | == Including EXCP, EXCPVR and STARTIO in a separate class == | ||
Revision as of 06:20, 29 June 2012
Contents
Usage
This template is to be used at the top of an article source code: To appear on the right top.
All the previous article like texts
cleanup: This is not an article! All the article-like stuff is to be moved, i.e. to the Access method article: All the intro paragraphs as well as all the latter chapters.
The OS/360 and successors I/O access methods are programming APIs on the OS/360 mainframe computer operating system and its successors, such as OS/VS1, OS/VS2 (SVS), MVS, OS/390, and z/OS, used by programmers to implement input/output operations on data sets (files) and telecommunications networks. They are by convention referenced to with ...AM acronyms, standing for ... Access Method.
Including EXCP, EXCPVR and STARTIO in a separate class
These are general purpose, low-level I/O device methods of access, and not "access methods" in the conventional use of this term.
In pre-MVS instances of the OS, EXCP was the lowest level method of access, and all access methods utilized EXCP.
In SVS, EXCPVR was added to enable programs which were executing in real storage to avoid much of the overhead of EXCP. This was continued in MVS.
In MVS and later instances of the OS, STARTIO replaced both forms of EXCP as the lowest level method of access. The so-called virtual access methods utilize STARTIO directly, or they have their own SVC which, in turn, utilizes STARTIO. The legacy access methods also utilize STARTIO, but go through EXCP to do so.
See also
External references
See also