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IEFBR14 consisted initially of a single instruction a "Branch to Register" 14. The mnemonic used in the IBM Assembler was BR and hence the name: IEF BR 14. BR 14 is identically equivalent to BCR 15,14 (Branch Always [ mask = 15 = always ] to the address contained in general purpose register 14). BR is a pseudo instruction for BCR 15.
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.
The Storage-Select Switch [65] determines the type of resource accessed by the Store Key and Display Key. Three selections are defined by the architecture: Main storage; General registers; Floating-point registers; The Address Switches [65] specify the address or register number for the Store Key, Display Key and, on some models, the Set IC Key..
Beginning of Program: Indicates the start of a new program to be assembled separately from previous programs in the same card deck. EQU: Equivalence: Equates a symbol to an absolute, regional, or symbolic value. SYN: Synonym: Equates a symbol to an absolute drum address. The address is marked unavailable for assignment
As it is an assembly language, BAL uses the native instruction set of the IBM mainframe architecture on which it runs, System/360.. The successors to BAL use the native instruction sets of the IBM mainframe architectures on which they run, including System/360, System/370, System/370-XA, ESA/370, ESA/390, and z/Architecture.
IBM's original OS/360 sort/merge program, 360S-SM-023, program name IERRCO00 (alias SORT), supported only IBM's first-generation direct-access storage devices (DASD) [d] and tapes (2400). Support for second-generation disk drives was provided by IBM program products such as 5734-SM1 and the later 5740-SM1 ( DFSORT , alias ICEMAN, also SORT).
Products, services, and subsidiaries have been offered from International Business Machines (IBM) Corporation and its predecessor corporations since the 1890s. [1] This list comprises those offerings and is eclectic; it includes, for example, the AN/FSQ-7, which was not a product in the sense of offered for sale, but was a product in the sense of manufactured—produced by the labor of IBM.
Both autocoder, and the unrelated autocode, a term of the same era used in the UK for languages of a higher level, derive from the phrase automatic coding.This referred generally to programs which eased the burden of producing the numeric machine language codes of programs. [2] "