COMPUTER SYSTEM, COMMON SYSTEM FOR ADDRESS SPACE WITH A PLURALITY OF INPUT/OUTPUT ADAPTERS AND COMMUNICATION CONTROL METHOD BETWEEN A PLURALITY OF INPUT/OUTPUT DEVICES AND COMPUTER PROCESSORS

摘要

PURPOSE: To share a common pair of input/output addresses by a plurality of input/output devices. CONSTITUTION: When interruption is requested in a block 600, an adapter generating interruption is read and a logical virtual identifying register and a virtual control register are read for deciding the state in the block 602. The state of the adapter is decided in the block 606 and interruption service is executed in the block 608 when the adapter is in a usage possible state. Unless it is the usage possible state, the state of the usage possible adapter is changed into a virtual usage possible state in the block 610 and the state of the virtual usage possible adapter is changed into the usage possible state in the block 612. Interruption service is executed in the block 608.