Distributed control store architecture
    3.
    发明公开
    Distributed control store architecture 失效
    分布式控制存储架构

    公开(公告)号:EP0178671A3

    公开(公告)日:1988-08-17

    申请号:EP85113207

    申请日:1985-10-17

    IPC分类号: G06F09/26

    CPC分类号: G06F9/26 G06F9/268 G06F9/28

    摘要: A method and apparatus for a microinstruction controi- led unit having multiple subunits which are controlled bv microoperations encoded within microinstructions from a control store. One master subunit controls the order in which the microinstructions are executea by generating the address of the next microinstruction to be read from the control store. The method provides for the overlapping of the execution of a current microinstruction while the next microinstruction is being addressed and read from the control store. The control store is divided into control substores with each control substore iocated near the subunit which executes the microcperations stored in its associated control substore. Subunits can atrect the order of microinstruction execution by causing a trad in the master subunit which will cause the next microinstruction to be read from a predefined address within the control store If required, the master subunit can read in status information from the subunits in order to determine the condition within the subunits that caused tne trap to occur. A means is provided for storing a return address which aliows to execution to continue at the next microinstruction that wot have executed had a trap not occurred.