| 摘要 |
PURPOSE:To improve the DMA processing capacity by performing the switch in a dynamically set ratio between the bus conflict control that stops a processor and acquires the bus use right and the conflict control that acquires the bus use right after the end of a cycle. CONSTITUTION:A device which performs the bus conflict control to acquire a bus after stopping a processor when a DMA request is received serves as the 1st bus conflict means 15. While a device which performs the bus conflict control after the end of a memory cycle of the processor serves as the 2nd bus conflict means 16. These two means 15 and 16 are switched with control by a switching means 14 in response to a ratio set by a ratio setting means 17. |
