| 摘要 |
PURPOSE:To eliminate the local biasing of the system performance by incrementing the priority of each device (decrementing) by one every time device acquires a bus control right, and providing a priority revision circuit bringing the lowest (highest) priority of a device to the highest (lowest) as a result. CONSTITUTION:Every time any SCSI (Small Computer System Interface) device acquires a bus control right, the priority of each device is incremented (decremented 1) by 1 and the priority revision circuit 2 is provided, which brings the priority of the device whose priority reaches the lowest (highest) into the highest (lowest) as the result. Thus, a disadvantage of awaiting the acquisition of the priority is eliminated and the disadvantage of a SCSI device cannot acquire the bus control right for a long time by chance is eliminated. |
