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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 ...
The program status word [a] (PSW) is a register that performs the function of a status register and program counter, and sometimes more. The term is also applied to a copy of the PSW in storage. The term is also applied to a copy of the PSW in storage.
Control Program Facility (CPF) is the operating system of the IBM System/38. [3] CPF represented an independendent line of development at IBM Rochester , and was unrelated to the earlier and more widely used System Support Program operating system.
Control units are assigned an address "capture" range. For example, a CU might be assigned range 20-2F or 40-7F. The purpose of this is to assist with the connection and prioritization of multiple control units to a channel. For example, a channel might have three disk control units at 20-2F, 50-5F, and 80-8F.
This version was released on June 30, 2006. On September 11, 2012, IBM extended the end of service for V6.1 by a full year, to September 30, 2013, and announced new version-to-version migration incentives and assistance. [27] It is a Java EE 1.4 compliant application server and includes the following function: Support for Java Standard Edition 1.5
A sample of naming conventions set by Sun Microsystems are listed below, where a name in "CamelCase" is one composed of a number of words joined without spaces, with each word's -- excluding the first word's -- initial letter in capitals – for example "camelCase".
This numbering is generated by Natural during program creation. Line numbers used by the compiler and editors, and can have important logical functions in the programs. Comments can be included in two ways: Full-line comments are identified by a "*" or "**" prefix. Annotated code lines have a "/*" - everything to its right is a comment. Examples:
The Pennsylvania State University developed a "Dual Autocoder Fortran Translator" (DAFT) compiler for the IBM 7074 in the 1960s which made it extremely easy to write (within a single program) lines of autocoder instructions freely interspersed with lines of Fortran code.