IBM A22-6864-0 2701 Data Adapter PrincOps Jul65 free download

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File No. 8360-09 Form A22-6864-0 Systems Reference Library IBM 2701 Data Adapter Unit Principles of Operation This manual provides information concerning the operation of the IBM 2701 Data Adapter Unit. The manual is divided into three sections. The first section gives a general description of the 2701, includ- ing: the terminals operating with the 2701, the functional organi- zation of the 2701, the special features on the 2701, and various configurations of the 2701. The second section describes the operation of the 2701 with the System/360. Subjects discussed here include communication line addressing, multiplexor and selector channel operation, and I/O instructions concerning the 2701. The third section covers the 2701's transmission adapters. A complete description on the operation of each adapter is made here. This description includes transmit and receive operation sequences, status and sense bytes, and the polling and addressing of the terminals. Copies of this and other IBM publications can be obtained through IBM Branch Offices. Address comments concerning the contents of this publication to: IBM Corporation, Product Publications, Dept. 528, Kingston, New York, 12401 Form A22-6864-0 Page Revised 7/1/65 By TNL N27-2901 Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 Functional Sections ... 5 Transmission Interface Converter (XIC) ... 5 I Transmission Adapter (XA) ... 5 Special Features ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Expansion Feature ... . . . . . . . . . . . . . . . . . .. 5 Expanded Capability Feature .. . . . . . . . . . . . . . . .. 6 Second Channel Interface Feature . . . . . . . . . . . . .. 6 Automatic Call Feature .. . . . . . . . . . . . . . . . . . . . .. 6 2701 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 Operational Functions . . . . . . . . . . . . . . . . . . . . . . . .. 9 Line Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9 2701- Channel Operation. . . . . . . . . . . . . . . . . . . . . .. 9 Multiplexor Channel Operation . . . . . . . . . . . . . . . .. 9 Selector Channel Operation . . . . . . . . . . . . . . . . . . .. 9 System Considerations . . . . . . . . . . . . . . . . . . . . . . .