SYSTEM/360 INTERFACE ENGINEERING REPORT
MICHIGAN UNIV ANN ARBOR
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An interface which connects a small special-purpose digital computer to a large general-purpose digital data processing system is described in this report. The small computer is the Digital Equipment Corporation PDP-8 which itself is a component of a data collection and distribution system called the Data Concentrator. The large data processing system is the IBM System360 Model 67, which is the principal computing element at The University of Michigan Computing Center. The interface is designed to be attached to the multiplexor channel of the Model 67 along with other input-output components such as card readers, line printers, and communications equipment, and satisfies all IBM standards and interface conventions established for this type of attachment. The interface provides a bidirectional data transfer between the two machines of up to 80 thousand bytes characters per second using cycle-steal techniques in which data are transferred directly between the Model 67 multiplexor channel and the PDP-8 core memory without explicit program intervention.
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