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The application program interfaces of IBM's mainframe operating systems is defined as a set of assembly language "macro" instructions, that typically invoke Supervisor Call (SVC) [e.g., on z/OS] or Diagnose (DIAG) [on, e.g., z/VM] instructions to invoke operating system routines. It is possible to use operating system services from programs ...
HASP was developed by IBM Federal Systems Division contractors at the Johnson Space Center in Houston. [1] [2] It originally managed job scheduling and print and punch output for a single OS/360 computer. Multi Access Spool capability was added to let peer computers share a common job queue and print/punch output queues. [citation needed]
In Synon/2, developers use a specialized language to define an application's data model and the rules that ensure its integrity. They then select from a set of around 30 pre-built program design templates which perform edit, display and print functions in full screen, multi-line and transaction (full screen header above a multi-line detail) modes.
The Conversational Monitor System (CMS, originally Cambridge Monitor System) [1] is a simple interactive single-user operating system. CMS was originally developed as part of IBM's CP/CMS operating system, which went into production use in 1967. CMS is part of IBM's VM family, which runs on IBM mainframe computers.
SVC is a two byte instruction with the hexadecimal operation code 0A; the second byte of the instruction, the SVC number, indicates the specific request. [2] The SVC number can be any value from 0 to 255, with the particular SVC number being up to the implementer of the operating system, e.g. on IBM's MVS, SVC 3 is used to terminate a program, while on the UNIVAC VS/9 and Fujitsu BS2000 ...
IBM 3277 Model 2. The IBM 3270 is a family of block oriented [1] display and printer computer terminals introduced by IBM in 1971 [2] and normally used to communicate with IBM mainframes. The 3270 was the successor to the IBM 2260 display terminal. [3] Due to the text color on the original models, these terminals are informally known as green ...
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In 1982 IBM changed the name to Interactive System Productivity Facility, [9] split off some facilities into Interactive System Productivity Facility/Program Development Facility (ISPF/PDF) and offered a version for VSE/AF. In 1984 IBM released ISPF Version 2 and ISPF/PDF Version 2; the VM versions [10] allowed the user to select either the PDF ...