公开(公告)号：US3997896A

公开(公告)日：1976-12-14

申请号：US591965

申请日：1975-06-30

申请人： Frank V. Cassarino, Jr. ,  George J. Bekampis ,  John W. Conway ,  Richard A. Lemay

发明人： Frank V. Cassarino, Jr. ,  George J. Bekampis ,  John W. Conway ,  Richard A. Lemay

IPC分类号： G06F11/14 ,  G06F13/18 ,  G06F13/378 ,  G06F13/42 ,  G06F13/00

CPC分类号： G06F11/1497 ,  G06F13/18 ,  G06F13/378 ,  G06F13/4213

摘要： In a data processing system which includes a common bus to which a plurality of units are connected for the transfer of information, information may be transferred by the highest priority requesting unit during an asynchronously generated bus transfer cycle. Logic is provided for enabling a split bus cycle operation in which the master unit requesting information from the slave unit during a first bus transfer cycle may receive such information from the slave unit during a later slave generated bus transfer cycle. Means are provided for enabling any other units to communicate over the common bus during the time between the first cycle and such later cycle during which the slave unit responds, thereby enabling at least two pairs of units to communicate with each other respectively in an interleaved manner.

摘要翻译： 在包括连接多个单元以用于信息传送的公共总线的数据处理系统中，在异步生成的总线传送周期期间，信息可以由最高优先级请求单元传送。 逻辑被提供用于实现分割总线周期操作，其中主单元在第一总线传送周期期间从从单元请求信息可以在随后从站产生的总线传输周期期间从从单元接收这种信息。 提供了用于使得任何其他单元能够在从单元响应的第一周期与后期周期之间的时间期间通过公共总线进行通信，从而使得至少两对单元能够以交错方式彼此通信 。

公开(公告)号：US3993981A

公开(公告)日：1976-11-23

申请号：US591964

申请日：1975-06-30

申请人： Frank V. Cassarino, Jr. ,  George J. Barlow ,  George J. Bekampis ,  John W. Conway ,  Richard A. Lemay ,  David B. O'Keefe ,  Douglas L. Riikonen ,  William E. Woods

发明人： Frank V. Cassarino, Jr. ,  George J. Barlow ,  George J. Bekampis ,  John W. Conway ,  Richard A. Lemay ,  David B. O'Keefe ,  Douglas L. Riikonen ,  William E. Woods

IPC分类号： G06F9/46 ,  G06F13/18 ,  G06F13/37 ,  G06F13/378 ,  G06F13/42 ,  G06F3/04 ,  G06F13/00

CPC分类号： G06F13/378 ,  G06F13/18 ,  G06F13/4213

摘要： In a data processing system having a plurality of units coupled for the transfer of information therebetween over a common electrical bus during asynchronously generated information bus transfer cycles, the units are coupled in a priority network and depending upon their respective priority may gain access to the bus before a lower priority unit is so enabled. Each one of the units includes apparatus for responding to a request for the transfer of information from another unit by providing any one of up to three signal responses including a positive acknowledge signal indicating an immediate response, a negative acknowledge signal indicating that the unit will most likely be busy for a relatively extended period of time and a quasi-negative response indicating that the unit will probably be ready during the next asynchronously generated bus transfer cycle.

摘要翻译： 在具有多个单元的数据处理系统中，在异步生成的信息总线传送周期期间，通过公共电气总线在其间传送信息而耦合，这些单元耦合在优先网络中，并且根据它们各自的优先级可以访问总线 在较低优先级的单元被启用之前。 每个单元包括用于通过提供包括表示立即响应的肯定确认信号的多达三个信号响应中的任何一个来响应来自另一个单元的信息传送的请求的装置，指示该单元最多的否定确认信号 可能在相对延长的时间段内处于忙碌状态，并且产生准负面响应，指示该单元可能在下一个异步生成的总线传输周期期间准备就绪。