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DATA PROCESSING SYSTEM, DATA PROCESSING METHOD AND PROGRAM

  • US 20080256264A1
  • Filed: 06/20/2008
  • Published: 10/16/2008
  • Est. Priority Date: 03/30/2005
  • Status: Active Grant
First Claim
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1. A data processing system comprising:

  • a first data processing apparatus for issuing a command; and

    a second data processing apparatus communicatively connected to the first data processing apparatus through a channel for performing command processing corresponding to the command;

    the first data processing apparatus comprising;

    an arithmetic processing unit for issuing first channel command words;

    a storage unit for storing data or information relating to the process; and

    an input/output channel unit for controlling communication including transferring of the command to the second data processing apparatus;

    the second data processing apparatus comprising;

    a control processor unit for performing the command processing;

    a memory unit for storing data or information relating to the process; and

    an input/output port unit for controlling communication including transferring of the command to the first data processing apparatus, wherein;

    when a conditional branch is not to be included with the first channel command words, the first data processing apparatus transfers the first channel command words to the second data processing apparatus in a plurality of channel command word frames;

    when a conditional branch is to be included with the first channel command words, the first data processing apparatus encodes a plurality of the first channel command words to create a plurality of second channel command words including a code having a command and its parameter and including the description of controlling a conditional branch according to the state and the processing result in the second data processing apparatus;

    the input/output channel unit transmits the second channel command words including the code to the input/output port unit;

    the input/output port unit receives the second channel command words including the code from the input/output channel unit,the second data processing apparatus decodes the code;

    the control processor unit sequentially processes each command obtained by the decoding according to the description of controlling the conditional branch and returns status information representing the processing result; and

    the input/output port unit transmits the status information as a response to the input/output channel unit.

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