| 摘要 |
PURPOSE:To enable to decide the priority of interruption request processing arbitrarily, by respectively providing the interruption request and approval lines to the 1st and 2nd peripheral device groups separately, and switching the interruption approval lines according to the content of the 1st interruption approval line. CONSTITUTION:In the information processing system in which the priority of interruption request processing of peripheral devices 53a-53e are determined with digital-chain system, the interruption request signal ATN to an input/output control section 51 is transferred via the signal line 54 for the 1st peripheral processor groups 53c-53e and via the signal line 55 for the 2nd peripheral device groups 53c-53e, and interruption approval signal ACK from the control section 51 is transferred to the device groups 53c-53e via the signal line 56 and to the device groups 53a, 53b via the signal line 57. The signal on the signal line 54 is delivered to the signal line 55 at the additional circuit 52, and the circuit 52 switches the output of the signal ACK from the control section 51 according to the signal state on the signal line 54. Thus, the interruption request for the peripheral device at remote location on the bus architecture from the control section 51 has the higher priority than the interruption request for the peripheral device located in the vicinity. |
