I/O data processing system
    2.
    发明公开
    I/O data processing system 失效
    E / A-Datenverarbeitungssystem。

    公开(公告)号:EP0049158A2

    公开(公告)日:1982-04-07

    申请号:EP81304501.0

    申请日:1981-09-29

    IPC分类号: G06F13/42 G06F15/16

    摘要: A data processing system includes a communication subsystem having an I/O microprocessor for communicating with a central processing unit and a main memory; and a line microprocessor for communicating with a number of devices. The 1/0 microprocessor and the line microprocessor communicate with each other through mailboxes stored in a shared memory 44. The line microprocessor is controlled by a PROM 58 and channel control programms (CCP's) in a RAM 60, and uses a work RAM 52 for data storage; the 1/0 microprocessor is controlled by a PROM 38 and uses a work RAM 40 for data storage. The line microprocessor interrupts the I/O microprocessor to process data bytes being transferred between main memory and a device requesting service when the line microprocessor has responded to the requesting device and loaded the mailbox.

    摘要翻译: 数据处理系统包括具有用于与中央处理单元和主存储器通信的I / O微处理器的通信子系统; 以及用于与多个设备通信的线路微处理器。 I / O微处理器和线路微处理器通过存储在共享存储器44中的邮箱彼此进行通信。线路微处理器由RAM60中的PROM58和通道控制程序(CCP)控制,并且使用工作RAM 52 数据存储; I / O微处理器由PROM 38控制,并且使用工作RAM40进行数据存储。 线路微处理器中断I / O微处理器以处理在主存储器和请求服务的设备之间传输的数据字节,当线路微处理器响应请求设备并加载邮箱时。