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1. 发明授权

US4449183A Arbitration scheme for a multiported shared functional device for use in multiprocessing systems 失效
标题翻译：用于多处理系统的多端口共享功能设备的仲裁方案
公开(公告)号：US4449183A
公开(公告)日：1984-05-15
申请号：US310825
申请日：1981-10-13
申请人： Barry J. Flahive , John J. Grady, III , Peter J. Rado
发明人： Barry J. Flahive , John J. Grady, III , Peter J. Rado
IPC分类号： G06F13/18 , G06F13/364 , G06F15/167 , G06F13/00
CPC分类号： G06F15/167 , G06F13/18 , G06F13/364
摘要： An arbitration network for use in a data multiprocessing system that includes a functional unit, such as a memory module, that is shared by several requestor devices, such as data processors, wherein access is granted to the shared functional unit through a common data bus on a rotating priority basis and wherein the arbitration cycle of the functional unit for determining priorities of the requestor devices is performed near the end of each operational cycle of the functional unit so that the next requestor device initiates its operational cycle immediately succeeding a current operational cycle then transacting thereby to minimize idle bus periods which would otherwise occur during arbitration cycle sequencing. When the bus is idle and only one request for access is made, the arbitration network foregoes the complete arbitration cycle and issues the grant to the requesting device thereby providing an earlier initiation of the data transfer cycle of the functional unit.
摘要翻译：一种在数据多处理系统中使用的仲裁网络，其包括诸如数据处理器之类的多个请求者设备共享的诸如存储器模块的功能单元，其中通过公共数据总线向共享功能单元授予访问旋转优先级基础，并且其中用于确定请求者设备的优先级的功能单元的仲裁周期在功能单元的每个操作周期结束时执行，使得下一个请求者设备在当前操作周期之后立即启动其操作周期从而最小化在仲裁循环排序期间会发生的空闲总线周期。当总线空闲并且只有一个请求访问时，仲裁网络放弃完整的仲裁周期，并向授权设备发放授权，从而提供功能单元的数据传输周期的较早启动。

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