| 摘要 |
PURPOSE:To extract only the specific type of information by indicating the type of information extracted out of a hardware queue at the reading side. CONSTITUTION:The communication is performed between a central processing unit 1 and the hardware 10 via a circuit consisting of a queue loading circuit 9, a hardware queue 7 and a queue extracting circuit 2. The circuit 2 contains a by-pass order register 4 and an extraction order register 5. Furthermore the circuit 2 contains a comparator which compares the type of the information extracted out of the queue 7 with the contents of the register 4 to deliver the information to the unit 1 when the coincidence is obtained from said comparison and to deliver the information to the circuit 9 through a reloading by-pass route 6. The information delivered to the circuit 9 is loaded again to the queue 7.
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