| 摘要 |
PURPOSE:To make the processing ability of a composite system efficient by selecting a start priority means and an interruption priority means with priority between plural host devices and plural I/O devices. CONSTITUTION:A start/interruption priority selection circuit 9 is formed in an I/O control device 2 connected between plural host devices 1a, 1b and plural I/O devices 3a-3n. The circuit 9 outputs an interruption priority signal output section T1 and a start priority signal output section T2 to start decision circuits 4a, 4b to circulate the ratio of the T to T2 between 1 to 1 and 1 to 10 at a fixed variation period. When an interruption signal is generated from the devices 3a-3n to the device 2, the control part 6 decides the sections T1, T2 of the circuit 9 and sets any one of the interruption priority signal or the start priority signal in the circuit 4a or 4b to process the selected signal. |
