SELECT SYSTEM FOR PRIORITY INTERFACE CIRCUITRY

    公开(公告)号:CA1119275A

    公开(公告)日:1982-03-02

    申请号:CA325548

    申请日:1979-04-11

    Applicant: IBM

    Abstract: SELECT SYSTEM FOR PRIORITY INTERFACE CIRCUITRY Selection of adapters belonging to a communications controller. The adapter of rank "i" registers in APi the highest priority level from amongst the services required of it by the elements it services. A comparison is made in an asynchronous manner between the level in APi and the priority levels of adapters of rank i+l through n. A SER SELECT line propagates down to up line the result which is obtained from said comparison and is utilized to set one of the latches S and to reset the other ones. The selection of the adapter to be serviced it limited to locating the latch S which is set. Data communications.

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