Local bus-ISA bridge for supporting PIO and third party DMA data
transfers to IDE drives
    1.
    发明授权
    Local bus-ISA bridge for supporting PIO and third party DMA data transfers to IDE drives 失效
    用于支持PIO和第三方DMA数据传输到IDE驱动器的本地总线ISA桥

    公开(公告)号:US5678064A

    公开(公告)日:1997-10-14

    申请号:US352131

    申请日:1994-12-01

    IPC分类号: G06F13/40 G06F13/14

    CPC分类号: G06F13/4027

    摘要: A method and arrangement is provided to support both fast Programmed Input/Output (PIO) and third party Direct Memory Access (DMA) data transfers between a system memory and Integrated Drive Electronics (IDE) drives. A DMA controller attached to an ISA bus supplies address, read and write signals in third party DMA data transfers. An IDE controller provides control signals to support the DMA data transfers. The IDE controller additionally provides address and control signals to support the PIO data transfers at local bus speeds. A local bus-ISA bridge is incorporated to support the system memory that resides on the local bus. An arbitration circuit arbitrates access to the ISA bus, and allows the IDE controller to seize the ISA bus for fast PIO data transfer.

    摘要翻译: 提供了一种方法和装置,用于支持系统内存和集成驱动电子(IDE)驱动器之间的快速编程输入/输出(PIO)和第三方直接内存访问(DMA)数据传输。 连接到ISA总线的DMA控制器提供第三方DMA数据传输中的地址,读取和写入信号。 IDE控制器提供控制信号来支持DMA数据传输。 IDE控制器还提供地址和控制信号,以支持本地总线速度下的PIO数据传输。 集成了一个局部bus-ISA桥,以支持驻留在本地总线上的系统内存。 仲裁电路仲裁访问ISA总线,并允许IDE控制器占用ISA总线以进行快速PIO数据传输。