| 摘要 |
PURPOSE:To improve the operating efficiency of a system by decreasing the generation of a DMA over-run, preventing the over-run from concentrating to the same channel and decrease the number of tries based on it. CONSTITUTION:The titled system provides a CPU1, a storage device 2, plural I/O devices and plural channel devices 3 to control the I/O device by a command from the CPU1. This is an interruption control system in an information processing system, in which the I/O device can directly execute the transmission and reception of information through the device 3 with the device 2. In this system, plural interrupting signals are prepared from the respective devices 3 to the CPU1. When the over-run of the input and output device is detected in an ending interruption request in direct information transferring between the I/O device and the device 2 by the command from a firmware, out of plural interrupting levels signals, a switching a executed to the interrupting level of a highly priority and interruption is requested again. |
