Based on the low-cost and steady-capability DOS(disk operation system) circumstance,two key technologies about the realization of continual real time data acquisition are introduced. One is DMA(direct memory access) and the other is two-buffer technology.

• 文中基于成本低、性能稳定的磁盘操作系统(disk operation system,DOS)环境,介绍实现连续实时数据采集的两项关键技术,一种是直接存储器存取(direct memory access,DMA)技术,一种是双缓冲技术。