什么是DMA？为什么要引入DMA？
什么是DMA？为什么要引入DMA？
相关考题：
What information is displayed by the command cat/proc/dma？（）A、 whether DMA is enabledB、 which DMA channels are in useC、 which DMA mode is in useD、 general information about DMA on the machine
单选题What information is displayed by the command cat/proc/dma？（）A whether DMA is enabledB which DMA channels are in useC which DMA mode is in useD general information about DMA on the machine
问答题CPU对DMA请求和中断请求的响应时间是否一样？为什么？