IBM GA24-3231-7 360-30 funcChar free download

File name GA24-3231-7_360-30_funcChar.pdf

File No. S360-01 Order No. GA24-3231-7 --.- - ... - - - -- - ----- Systems Reference Library -~-.- ---- - . --- - ---- - --- IBM System/3S0 Model 30 Functional Characteristics This reference publication describes the relationship of the IBM System/360 Model 30 to the entire System/360, The system's capabilities, features, I/O channels, and operations are also discussed. The reader can find a more detailed description of System/360 operations in IBM System/360 Principles of Operation, GA22-6821. The interrelationships of the models and units available with System/360 are broadly described in IBM System/360 System Summary, GA22-6810. Other related literature is referenced by order number and briefly described in IBM System/360 Bibliography, GA22-6822. Information on channel load limits for IBM System/360 Model 30 is given in IBM System/360 Model 30 Channel Characteristics and Functional Evaluation, GA24-3411. System-console operating procedures are contained in IBM System/360 Model 30 Operating Guide, GA24-3373. Preface The first section of this manual-IBM System/360 l\,f ode130, General Concepts-presents a general intro- duction to some important IBM System/360 concepts and terminology. Throughout most of this section, con- cepts such as program status words, supervisor pro- gram, and interrupts are related to input/output oper- ations. The object of this section is to present certain system operations, referenced to IBM System/360 Model 30, without taking into account all possible variations and exceptions that may apply. Subsequent sections of this publication provide more detailed in- formation. IBM System/360 Model 30 has a storage cycle time of 1.5 microseconds. Early systems, however, have a 2-microsecond storage cycle time. In this publication, timings that pertain to the 2-microsecond Central Processing Unit (cpu) are shown in parentheses fol- lowing the timings given for the 1.5-microsecond CI1U. For example: The RCW (read/compute/write) cycle requires 2.25 microseconds (for 2-microsecond CPU: 3 microsec- onds). Eighth Editioll (August 1971) This is a reprint of GA24-3231-6 incorporating changes released in Technical Newsletter, GN24-047S, dated July 19, 1971. Changes are periodically made to the specifications herein: before using this publication in connection with the operation of IBM systems, refer to the latest SRL Newsletter, GN20-0360, for the editions that are applicable and current. Requests for copies of IBM publications should be made to your IBM representative or to the IBM branch office serving your locality. This manual has been prepared by the IBM Systems Development Division, Product Publications, Dept. K10, P.O. Box 6, Endicott, N.Y.