I/O INTERRUPT SEQUENCING
    3.
    发明专利

    公开(公告)号:CA1115850A

    公开(公告)日:1982-01-05

    申请号:CA334531

    申请日:1979-08-24

    Applicant: IBM

    Abstract: An improved I/O interrupt sequencing method and apparatus including generation of an instruction priority request signal to indicate that a real time task requires programmed I/O service. Generating an end of chain signal to suspend burst I/O control of the I/O bus and allow programmed I/O service to a real time device, and resetting the instruction priority request signal to allow burst mode data transfer to continue at the count positions at which it was suspended. KI9-78-0066

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