公开(公告)号：US3967249A

公开(公告)日：1976-06-29

申请号：US537450

申请日：1974-12-30

申请人： Yukio Taniyama ,  Tetsuo Isaka ,  Tetsuo Nagahori ,  Kaoru Kanda

发明人： Yukio Taniyama ,  Tetsuo Isaka ,  Tetsuo Nagahori ,  Kaoru Kanda

IPC分类号： G06F13/372 ,  G06F9/46 ,  G06F13/14 ,  G06F13/368 ,  G06F3/04

CPC分类号： G06F13/368

摘要： A selection system for an information processing system wherein a unit, such as a magnetic tape unit, is shared by a plurality of control units. At least first and second signal lines are connected between each control unit at a driver circuit and a receiver circuit pair. The two signal lines connected between each control unit correspond to a single shared unit, and each control unit provides a driver circuit and a receiver circuit connected so as to transmit and receive signals carried on each line. Each line is connected to a separate driver circuit and receiver circuit at each control units. A block signal is transmitted from one of the control units through a first signal line to the other control units to prevent them from starting their operation for accessing the shared unit, and selection signals are transmitted from possible plurality of started control units through the second signal line at different timings to thereby determine priority of the started control units for accessing the shared unit. With this system, the control units can be correctly operated in accordance with priority by simple circuit construction without employing a scanning system, and further, the number of control units can be increased without increasing the cost of the selection system.

摘要翻译： 一种用于信息处理系统的选择系统，其中诸如磁带单元的单元由多个控制单元共享。 至少第一和第二信号线连接在驱动电路的每个控制单元和接收器电路对之间。 连接在每个控制单元之间的两个信号线对应于单个共享单元，并且每个控制单元提供连接的驱动器电路和接收器电路，以便发送和接收每行上承载的信号。 每条线路连接到每个控制单元的单独的驱动电路和接收器电路。 从其中一个控制单元通过第一信号线将块信号发送到其他控制单元，以防止它们开始其访问共享单元的操作，并且通过第二信号从可能的多个起始控制单元发送选择信号 在不同的定时线路，从而确定用于访问共享单元的启动的控制单元的优先级。 利用该系统，通过简单的电路结构，可以根据优先权正确地操作控制单元，而不需要使用扫描系统，此外，可以增加控制单元的数量，而不增加选择系统的成本。