×

Information processing apparatus for performing two-way interruption processing

  • US 5,317,748 A
  • Filed: 07/16/1992
  • Issued: 05/31/1994
  • Est. Priority Date: 07/17/1991
  • Status: Expired due to Fees
First Claim
Patent Images

1. An information processing apparatus comprising:

  • means for storing information;

    input/output means for inputting the information to the storing means and for outputting the information from the storing means; and

    control means, disposed between the storing means and the input/output means, for performing information processing control, wherein the control means comprises;

    a main board,at least one expansion slot,an expansion board disposed in the at least one expansion slot, anda system bus connecting the main board to the expansion board;

    wherein the main board comprises;

    an input/output port,a main central processing unit for controlling the information, managing the presence and absence of the expansion board and accessing the input/output port by an interruption that corresponds to the expansion board, andan expansion board select means, connected to the main central processing unit, for selecting the expansion board by producing an expansion slot select signal and thereby causing the expansion board to be interrupted; and

    wherein the expansion board comprises;

    a system bus interface means for receiving the expansion slot select signal and for generating a control signal,an interruption detection means for decoding an input/output address entered from the system bus, for receiving the control signal and for generating an interruption signal,an interruption control means, connected to the interruption detection means, for receiving the interruption signal and for generating an interruption request signal, anda sub central processing unit, connected to the interruption control means and the system bus interface means, for receiving the interruption request signal and for performing interruption processing.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×