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71. 发明授权

US5590292A Scalable tree structured high speed input/output subsystem architecture 失效
标题翻译：可扩展树结构高速输入/输出子系统架构
公开(公告)号：US5590292A
公开(公告)日：1996-12-31
申请号：US7333
申请日：1993-01-21
申请人： David R. Wooten , Craig A. Miller , Kevin B. Leigh , Robert B. Costley , Christopher E. Simonich
发明人： David R. Wooten , Craig A. Miller , Kevin B. Leigh , Robert B. Costley , Christopher E. Simonich
IPC分类号： G06F13/40 , G06F13/36 , G06F15/17
CPC分类号： G06F13/4022
摘要： A point to point connection architecture for a computer I/O subsystem, resulting in a scalable tree structure. A Master I/O Concentrator (MIOC) is connected to the host bus and handles conversion between a bus oriented structure and the tree structure of the I/O subsystem. Ports away from the host bus are downstream ports and conform to a simple byte wide message protocol. Various IOCs and devices can be attached to one of the downstream ports on the MIOC. The MIOC directs transmissions to the appropriate channel based on a geographical addressing scheme. The IOC connections act as further points of branching. Ultimately IOD or I/O devices are reached, having an upstream port for connection to the IOC and a downstream port and internal logic appropriate for the particular peripheral device. Various registers are present in the IOCs and the IODs to allow determination of the topology and particular devices present. Messages and commands are transferred in the I/O subsystem in defined packets. Various read, write and exchange commands are used, with a read response being utilized to allow split transaction read operations. Certain status and control commands are also present. Interrupts are handled by having the interrupt levels correspond to memory addresses of the programmable interrupt controller, thus allowing simple selection of interrupts to be generated by the devices and no need for separate wiring.
摘要翻译：用于计算机I / O子系统的点对点连接架构，从而产生可扩展的树结构。主I / O集中器（MIOC）连接到主机总线，处理面向总线的结构与I / O子系统的树结构之间的转换。远离主机总线的端口是下游端口，符合简单的字节宽消息协议。各种IOC和设备可以连接到MIOC的下游端口之一。 MIOC根据地理寻址方案将传输指向适当的信道。 IOC连接充当分支的进一步点。最终达到IOD或I / O设备，具有用于连接到IOC的上行端口和下游端口以及适用于特定外围设备的内部逻辑。各种寄存器存在于IOC和IOD中，以允许确定拓扑和存在的特定设备。消息和命令在I / O子系统中以定义的数据包传输。使用各种读取，写入和交换命令，其中使用读取响应来允许分离事务读取操作。还存在某些状态和控制命令。中断通过使中断电平对应于可编程中断控制器的存储器地址来处理，从而允许简单地选择要由器件产生的中断，而不需要单独的布线。

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