释义 |
I/O trunks e.g.,a magnetic tape control connects to a pair of trunks.Data are transferred between main memory and a trunkand a peripheral devicevia the read/write channel specified in the instruction which initiates the transfer.Additional peripheral devices can be connected to the system simply by adding more I/O trunks to the basic configuration.The number of peripheral devices in a system depends only on the number of I/O trunks available.;可以连接到管理读写的外部设备控制器上的一种干线例如一台磁带控制器可以连接一对线。数据通过由启动传送的指令规定的读写通道在主存和一条干线以及某一外部设备之间进行传送。可以简单地通过在基本配置上增加输入输出干线的方法将增加的外部设备连接到系统上去。系统中的外部设备数仅取决于可用的输入输出干线的数目。 |