IBM GA27-2731-2 2265 2845 Component Description Jan70 free download

File name GA27-2731-2_2265_2845_Component_Description_Jan70.pdf

File No. S360-09 Form GA27-2731-2 Systems Reference Library IBM System/36D Component Description IBM 2265 Display Station Modell IBM 2845 Display Control This manual describes the functional and operating characteristics of the I IBM 2265 Display Station Model 1 and the IBM 2845 Display Control. The two units combine to form a display system that provides visual access to data stored in an IBM System/360. The IBM 2265 Display Station Model 2, which can be attached only to an IBM 2772 Multi-Purpose Control Unit, is described in System Components: IBM 2770 Data Communications I System, Form GA27-3013. Preface This SRL publication assumes the reader has a knowledge IBM System/360 Principles of Operation, Form of System/360 principles of operation. Therefore, dis- GA22-6821 cussions of such System/360 considerations as instruction IBM 2701 Data Adapter Unit - Component Description, and command structures, Channel Status Word and Pro- Form GA22-6864 gram Status Word locations and usage, varieties and pri- IBM System/360 Bibliography, Form GA22-6822 I orities of interruptions, and generalized capabilities such as IBM Multiplexers and Communications Terminals I/O channel status and sense byte usage, command and Installation Manual- Physical Planning, Form data chaining, length suppression, etc., have been kept to GA27-3006 a minimum. This publication does not differentiate be- tween the various models of System/360; i.e., main storage Note: In this manual, "I/O (input/output) channel" refers capacities, sub channel allocations, sharing and nonsharing to a multiplexer channel. This device provides the data of I/O channel and processor circuitry, and so forth. The path and controls between the central processor and the reader is directed to the authoritative source for each 2701 Data Adapter Unit. "Communications channel" model of System/360, System/360 Functional Character- refers to the communications medium (telephone lines, istics (by model). Other IBM publications that will be of telegraph, microwave, etc.) used to transmit data, via use to the reader are: appropriate data sets, between the 2701 and the 2265-1/ 2845 display system. Third Edition (January, 1970) This is a major revision of, and obsoletes, Form A27-2731-1 and Technical Newsletter N27-2948. The significant changes in this edition include the