OS Assembler Language Release 21
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Computer programs may be expressed in machine language, i.e., language directly interpreted by the computer, or in a sym bolic language, which is much more meaning ful to the programmer. The symbolic lan guage, however, must be translated into machine language before the computer can execute the program. This function is accomplished by a processing program. Of the various symbolic programming lan guages, assembler languages are closest to machine language in form and content. The assembler language discussed in this manual is a symbolic programming language for the IBM System/360. It enables the programmer to use all IBM System/360 machine func tions, as if he were coding in System/360 machine language. The assembler program that processes the language translates symbolic instructions into machine-language instructions, assigns storage locations., and performs auxiliary functions necessary to produce an executa ble machine-language program.
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