IBM SY22-2840-2 Model 40 Comprehensive Introduction Apr70 free download

File name SY22-2840-2_Model_40_Comprehensive_Introduction_Apr70.pdf

Jr J~) ~ Field Engineering Theory of Operation System/360 Model 40 Comprehensive Introduction SY22-2840-2 Preface This manual describes the basic data flow, machine instruotion, and channel operations of the IBM 2040 Processing Unit. The basic numbering systems used within the IBM System/360 are explained in detail. A thorough understanding of this information is helpful in the study of the more complex units of the system. Other manuals useful in understanding the Model 40 are: IBM System/360 Model 40, Functional Units, Order No. SY22-2843 IBM System/360 Model 40, Theory of Operation, Order No. SY22-2844 IBM System/360 Model 40, Power Supplies, Fea- tures, and Appendix, Order No. SY22-2845 IBM System/360 Model 40, Maintenance Manual, Order No. SY22-2841 IBM System/360 Model 40, Diagrams Manual, Or- der No. SY22-2842 Solid Logic Technology Power Supplies, Order No. SY22-2799 Solid Logic Technology, Packaging, Tools, and Wiring Change, Order No. SY22-2BOO This manual is written to engineering change level 254814 for ALD'S and CLD level 255263. Sixth Edition (April, 1970) This edition, Order No. SY22-2840-2, is a reprint of Form Y22-2840-1 incorporating changes released in FE Supplement Y22-6783, dated January 31,1969. Changes are periodically made to the specifications herein; any such changes will be reported in subsequent revisions or FE Supplements. This manual has been prepared by the IBM Systems Development Division, Product Publications, Dept. B96, P.O. Box 390, Poughkeepsie, N.Y. 12602. A form for readers' comments is provided at the back of this publication. If the form has been removed, comments may be sent to the above address. (0 Copyright International Business Machines Corporation 1966, 1970 Contents Introduction to IBM System/360 Model 40 5 Standard Interface ... . 36 System/360 ... . ... . 5 Input/Output Operations 36 The Processor Family. . . . . ... . 5 Channel Types ... . ... . 37 Flexibility and Compatibility . . . . . . .. . ... . 6 Channel Operation ... . 38 System/360 Model 40 . . . ... . 6 Channel Program ... . 38 Computer Functional Units ... . 6 Device Addressing ... . 39 Functional Units - System/360 Model 40. 9 Channel Address Word ( CAW) .