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A Standard instruction set pro- vides the basic computing function of the system. To this set a decimal feature may be added to provide a.The manual defines System/360 operating princi- List of Instructions by Set and Feature . Commercial instruction set or a floating-point feature. characteristics of System/360 and its instruction set. Many sample programs are 'used to illustrate specific instructions and programming techniques. F.1. Introduction. F-2. F.2. System/360 Instruction Set. F-3. F.3. 360 Detailed Measurements. F-6. F.4. Historical Perspective and References. F-8 CS 350. S/360. • Instruction set a UNION of instruction sets. – fixed-point binary (7090). – floating binary (7090). – decimal character-oriented (1401). A standard instruction set, including fixed-point binary arithmetic and logical instructions, present on all System/360 models (except the model 20, see below). Instruction formats of IBM 360. • Instruction length is variable. • Some instructions cause no reference to main storage; others cause one or more.