I/O Adapter with direct memory access to I/O control information

作者: Shiro Oishi , Masatsugu Shinozaki

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摘要: A data proessing system includes a processor, memory, direct memory accessing (DMA) control unit and an input/output adapter. area of given capacity is reserved in the for storing information transferred between processor For transfer information, adapter accesses stored through under DMA while can make access to read/write command. By at predetermined adapter, quantity hardware number IC's required implementing be significantly reduced. Conflicting requests main by are prevented time-division bus.

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