信息交换中的DMA技术

The technology of DMA used in the control of information exchange

DMA技术广泛应用于外围设备与内存成批信息交换的控制过程中 ,它的优势是在数据传送过程中不需CPU的参与 ,实现了CPU处理任务和内存数据交换的并行进行 ,提高了计算机的整体性能 .本文从DMA技术的硬件构成角度 。

The technology of DMA is widely used in the control of information exchange between peripheral and memory,the advantage of this technology is the procedure of data transportation which can be done without CPU,CPU processing task and memory data exchange can be done in parallel,so it can improve the whole performance of computer.From the angle of the form of hardware of the technology of DMA,the paper has introduced the logic form of DMAC hardware and the flow of DMA data transpotation.