Interface system providing interfaces to central processing unit

Details Interface system providing interfaces to central processing unit Interface system providing interfaces to central processing unit

1977-09-29

1978-08-08

Thomas, James D.

Boots, shoes, and leggings

G06F 304, G06F 906, G06F 1300, G06F 1520

Patent

active

041060920

ABSTRACT:
A sub-interface system within an Input-Output Subsystem of a digital data processing system. The interface subsystem comprises a Main System Interface of a central processing unit working with the distribution-control means of a Base Module housing a group of Line Control Processors (individual Intelligent I/O Interface units) dedicated to a specific peripheral device. The Main System Interface is designated as an IOT, or Input-Output Translator, and translates input-output instructions into proper form for delivery to a particular intelligent interface unit which can execute the instructions. The IOT provides a data link identifier to identify each particular data-transfer transaction and receives result information from the Line Control Processor and Base Module to keep the Main System informed of the status or completion of each individual data-transfer operation. The Input-Output Translator provides a selection of priority to be given to competing Line Control Processor requests for access to Main Memory and communicates with individual Line Control Processors in their control of data-transfer operations between various peripheral devices and the Main Memory of the System.

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patent: 3725871 (1973-04-01), Heuttner
patent: 3766526 (1973-10-01), Buchanan
patent: 3976977 (1976-08-01), Porter

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