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Computer system with a reduced number of command end interrupts from auxiliary memory unit and method of reducing the number of command end interrupts

  • US 5,802,345 A
  • Filed: 03/28/1995
  • Issued: 09/01/1998
  • Est. Priority Date: 03/28/1994
  • Status: Expired due to Term
First Claim
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1. A computer system comprising:

  • a host machine having a memory and a CPU which includes interrupt handling feature;

    an auxiliary memory unit for recording and reproducing data; and

    an input/output unit for permitting data input and output between said host machine and said auxiliary memory unit;

    said CPU of said host machine includes;

    means for generating a plurality of commands for designating access to said auxiliary memory unit, andrelation means, responsive to at least one command, for grouping a plurality of said commands according to type for designating access to said auxiliary memory unit, into at least one group and for supplying said input/output unit with said commands independently of one another;

    said input/output unit includes;

    access execution means for executing access to said auxiliary memory unit as designated by each of the commands of one group of said at least one group supplied independently of one another by said CPU, andnotification means for notifying said CPU by a single interruption that execution of the commands of said one group has been terminated when the accesses designated by all commands belonging to said one group are found to have been terminated.

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