公开(公告)号：US4272819A

公开(公告)日：1981-06-09

申请号：US024032

申请日：1979-03-26

申请人： Yutaka Katsumata ,  Mitsuru Sanagi ,  Hideo Tanaka

发明人： Yutaka Katsumata ,  Mitsuru Sanagi ,  Hideo Tanaka

IPC分类号： G06F15/167 ,  G06F13/32 ,  G06F13/38 ,  G06F15/17 ,  G06F15/16

CPC分类号： G06F15/17 ,  G06F13/32

摘要： In an inter-subsystem communication system which has a communication queue enqueued by one subsystem having processors and dequeued by another subsystem having processors, there is provided between the subsystems direct memory access means which permits either of the subsystems to directly access a memory of the other subsystem, and in a queue element enqueued by the one subsystem is inserted memory access control information necessary for accessing the one subsystem, whereby a high-grade function is performed by the plurality of subsystems. When the source subsystem issues an enqueue command, the queue element length of a queue element produced in response to the queue command is compared with a remaining space of the queue and, if the comparison result satisfies a predetermined condition, an overflow interruption is caused in the processor of the source subsystem, thereby to efficiently detect a queue overflow state or queue usable state.

摘要翻译： 在子系统通信系统中，具有由具有处理器的一个子系统排队的通信队列并由具有处理器的另一个子系统排队的子系统间通信系统，在子系统之间提供直接存储器访问装置，其允许子系统之一直接访问另一个的存储器 子系统，并且在由一个子系统排队的队列元素中插入访问一个子系统所需的存储器访问控制信息，由此由多个子系统执行高级功能。 当源子系统发出入队命令时，将与队列命令对应的队列元素的队列元素长度与队列的剩余空间进行比较，如果比较结果满足预定条件，则会导致溢出中断 源子系统的处理器，从而有效地检测队列溢出状态或队列可用状态。