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IBM Systems Journal

Issue 2 • Date 1964

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Displaying Results 1 - 8 of 8
  • The structure of SYSTEM/360

    Publication Year: 1964 , Page(s): 118
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    Freely Available from IEEE
  • The structure of SYSTEM/360: Part I—Outline of the logical structure

    Publication Year: 1964 , Page(s): 119 - 135
    Cited by:  Papers (5)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1823 KB)  

    In the SYSTEM/36O logical structure, processing efficiency and versatility are served by multiple accumulators, binary addressing, bit-manipulation operations, automatic indexing, fixed and variable field lengths, decimal and hexadecimal radices, and floating-point as well as fixed-point arithmetic. The provisions for program interruption, storage protection, and flexible CPU states contribute to effective operation. Base-register addressing, the standard interface between channels and input/output control units, and the machine-language compatibility among models contribute to flexible configurations and to orderly system expansion. View full abstract»

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  • The structure of SYSTEM/360, Part II: System implementations

    Publication Year: 1964 , Page(s): 136 - 143
    Cited by:  Papers (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1244 KB)  

    A primary goal in the SYSTEM/360 design effort was a wide range of processing unit performances coupled with complete program compatibility. In keeping with this goal, the logical structure of the resultant system lends itself to a wide choice of components and techniques in the engineering of models for desired performance levels. View full abstract»

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  • The structure of SYSTEM/360, Part III: Processing unit design considerations

    Publication Year: 1964 , Page(s): 144 - 164
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2016 KB)  

    The design objectives laid down for SYSTEM/360 included requirements for large memory capacities, simple program relocation, flexible storage protection, and general supervisory facilities. Also required were a variety of data formats, an extensive set of processing operations, and machine-language compatibility among models of widely varying performance. This paper comments upon the addressing, sequencing, monitor control, and central processing solutions that were adopted to reconcile these requirements and to meet the needs of diverse computer applications. View full abstract»

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  • The structure of SYSTEM/360, Part IV: Channel design considerations

    Publication Year: 1964 , Page(s): 165 - 179
    Cited by:  Papers (5)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1784 KB)  

    Control of I/O operations in a multiprogrammed system involves many complicated functions, such as allocation of facilities and protection against mutual interference among programs. In SYSTEM/360, most responsibilities associated with multiprogramming I/O operations, as well as all device dependent functions, are assigned to the programming system, and channel equipment is designed to operate in conjunction with a supervisory program. Channels permit overlapping of CPU and I/O activity and provide general functions more economically implemented in hardware than in software. View full abstract»

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  • The structure of SYSTEM/360, Part V: Multisystem organization

    Publication Year: 1964 , Page(s): 181 - 195
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1810 KB)  

    SYSTEM/360 is designed for multiprogramming as a basic mode of operation, and for multisystem operation as an increasingly important mode of operation. View full abstract»

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  • Authors

    Publication Year: 1964 , Page(s): 196
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    Freely Available from IEEE
  • A formal description of SYSTEM/360

    Publication Year: 1964 , Page(s): 198 - 261
    Cited by:  Papers (16)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (4674 KB)  

    This paper presents a precise formal description of a complete computer system, the IBM SYSTEM/360 The description is functional: it describes the behavior of the machine as seen by the programmer, irrespective of any particular physical implemention, and expressly specifies the state of every register or facility accessible to the programmer for every moment of system operation at which this information is actually available. View full abstract»

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Throughout its history, the IBM Systems Journal has been devoted to software, software systems, and services, focusing on concepts, architectures, and the uses of software.

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John J. Ritsko
IBM T. J. Watson Research Center5