公开(公告)号：US5416907A

公开(公告)日：1995-05-16

申请号：US538656

申请日：1990-06-15

申请人： R. Stephen Polzin ,  James N. Leahy ,  Robert E. Willard

发明人： R. Stephen Polzin ,  James N. Leahy ,  Robert E. Willard

IPC分类号： G06F13/28 ,  G06F13/40 ,  G06F15/17 ,  G06F3/00 ,  G06F7/32 ,  G06F15/04

CPC分类号： G06F15/17 ,  G06F13/28 ,  G06F13/4018

摘要： A method and apparatus for optimizing the performance of a multibus data processing system is provided. An I/O controller is coupled to the I/O bus and includes MORE bit setting means for initiating a MORE stream transaction on the I/O bus and for thereafter terminating the MORE stream transaction. An adapter coupling the I/O bus to the system bus, is configured to receive the MORE stream transaction and transfer it to main memory. The adapter includes MORE bit decoding means for identifying the beginning and the end of the MORE stream transaction, and for identifying whether the MORE stream transaction is a READ or WRITE transaction. The adapter also includes a first buffer for receiving data from the I/O bus and transferring the data to the memory in accordance with the memory's full block transfer size, and a second buffer for receiving a full block of data and transferring that data in accordance with the I/O bus transaction limitations. The adapter is capable of invalidating data located in the first buffer and clearing data located in the second buffer in accordance with a discard transaction when the I/O controller fails to properly terminate the MORE stream transaction.

摘要翻译： 提供了一种用于优化多机架数据处理系统的性能的方法和装置。 I / O控制器耦合到I / O总线，并且包括更多位设置装置，用于在I / O总线上启动MORE流事务，并且此后终止MORE流事务。 将I / O总线耦合到系统总线的适配器被配置为接收MORE流事务并将其传送到主存储器。 适配器包括更多位解码装置，用于识别更多流事务的开始和结束，以及用于识别更多流事务是READ还是WRITE事务。 适配器还包括用于从I / O总线接收数据并根据存储器的完整块传输大小将数据传送到存储器的第一缓冲器，以及用于接收完整数据块并根据数据传送该数据的第二缓冲器 与I / O总线交易限制。 当I / O控制器无法正确终止MORE流事务时，适配器能够根据丢弃事务使位于第一缓冲区中的数据无效并清除位于第二缓冲区中的数据。

公开(公告)号：US4271505A

公开(公告)日：1981-06-02

申请号：US54201

申请日：1979-07-02

申请人： Robert Menot ,  Robert E. Willard ,  Paul D. Griem ,  Guy E. Devine

发明人： Robert Menot ,  Robert E. Willard ,  Paul D. Griem ,  Guy E. Devine

IPC分类号： G06F13/37 ,  G06F13/42 ,  H04J3/24 ,  H04J6/00

CPC分类号： H04J3/245 ,  G06F13/37 ,  G06F13/4213

摘要： A distributed, electronic process control system is disclosed having a plurality of remotely located stations interacting to control a complex industrial process. The stations communicate via a process communication link which supports secure, multi-master communication. The link provides a transparent medium of exchange for the secure transfer of process status and control information among the stations, such that each station may initiate and control system communication for a predetermined time period.

摘要翻译： 公开了一种分布式电子过程控制系统，其具有多个远程位置站，以相互作用以控制复杂的工业过程。 站点通过支持安全，多主机通信的进程通信链路进行通信。 该链路提供了一个透明的交换介质，用于各站之间的过程状态和控制信息的安全传送，使得每个站可以在预定时间段内发起和控制系统通信。