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- Data_Control_Block abstract "In IBM mainframe operating systems, such as OS/360, MVS, z/OS, a Data Control Block (DCB) is a description of a dataset in a program. A DCB is coded in Assembler programs using the DCB macro instruction (which expands into a large number of "define constant" instructions). High level language programmers use library routines containing DCBs.A DCB is one of the many control blocks used in these operating systems. A control block is a data area with a predefined structure, very similar to a C struct, but typically only related to system's functions. A DCB may be compared to a FILE structure in C, but it is much more complex, offering many more options for various access methods.The control block acted as the Application programming interface between Logical IOCS and the application program and usually was defined within (and resided within) the application program itself. The addresses of I/O subroutines would be resolved during a linkedit phase after compilation or else dynamically inserted at OPEN time.The equivalent control block for IBM DOS/360, DOS/VSE and z/VSE operating systems is a "DTF" (Define the file)[1]".
- Data_Control_Block wikiPageExternalLink hcsd3b00155.htm.
- Data_Control_Block wikiPageID "13578970".
- Data_Control_Block wikiPageLength "3165".
- Data_Control_Block wikiPageOutDegree "25".
- Data_Control_Block wikiPageRevisionID "573426858".
- Data_Control_Block wikiPageWikiLink Access_method.
- Data_Control_Block wikiPageWikiLink Application_program.
- Data_Control_Block wikiPageWikiLink Application_programming_interface.
- Data_Control_Block wikiPageWikiLink Application_software.
- Data_Control_Block wikiPageWikiLink Assembly_language.
- Data_Control_Block wikiPageWikiLink Category:IBM_mainframe_operating_systems.
- Data_Control_Block wikiPageWikiLink 360_and_successors.
- Data_Control_Block wikiPageWikiLink VSE.
- Data_Control_Block wikiPageWikiLink Data_Set_Control_Block.
- Data_Control_Block wikiPageWikiLink Data_buffer.
- Data_Control_Block wikiPageWikiLink Data_set_(IBM_mainframe).
- Data_Control_Block wikiPageWikiLink Disk_sector.
- Data_Control_Block wikiPageWikiLink O.
- Data_Control_Block wikiPageWikiLink IBM_mainframe.
- Data_Control_Block wikiPageWikiLink IOCS.
- Data_Control_Block wikiPageWikiLink Output_Control_System.
- Data_Control_Block wikiPageWikiLink output.
- Data_Control_Block wikiPageWikiLink Job_Control_Language.
- Data_Control_Block wikiPageWikiLink Library_(computing).
- Data_Control_Block wikiPageWikiLink Linker_(computing).
- Data_Control_Block wikiPageWikiLink Logical_record_length.
- Data_Control_Block wikiPageWikiLink MVS.
- Data_Control_Block wikiPageWikiLink 360.
- Data_Control_Block wikiPageWikiLink 360_and_successors.
- Data_Control_Block wikiPageWikiLink Operating_system.
- Data_Control_Block wikiPageWikiLink Storage_block.
- Data_Control_Block wikiPageWikiLink VSE_(operating_system).
- Data_Control_Block wikiPageWikiLink Volume_table_of_contents.
- Data_Control_Block wikiPageWikiLink OS.
- Data_Control_Block wikiPageWikiLink VSE.
- Data_Control_Block wikiPageWikiLinkText "DCB".
- Data_Control_Block wikiPageWikiLinkText "Data Control Block".
- Data_Control_Block hasPhotoCollection Data_Control_Block.
- Data_Control_Block wikiPageUsesTemplate Template:Mainframe-compu-stub.
- Data_Control_Block wikiPageUsesTemplate Template:Operating-system-stub.
- Data_Control_Block subject Category:IBM_mainframe_operating_systems.
- Data_Control_Block hypernym Description.
- Data_Control_Block type Stadium.
- Data_Control_Block type Computer.
- Data_Control_Block comment "In IBM mainframe operating systems, such as OS/360, MVS, z/OS, a Data Control Block (DCB) is a description of a dataset in a program. A DCB is coded in Assembler programs using the DCB macro instruction (which expands into a large number of "define constant" instructions). High level language programmers use library routines containing DCBs.A DCB is one of the many control blocks used in these operating systems.".
- Data_Control_Block label "Data Control Block".
- Data_Control_Block sameAs m.03c9zkj.
- Data_Control_Block sameAs Q5227153.
- Data_Control_Block sameAs Q5227153.
- Data_Control_Block wasDerivedFrom Data_Control_Block?oldid=573426858.
- Data_Control_Block isPrimaryTopicOf Data_Control_Block.