一、前言计算技术的迅速发展对存储技术提出了新的要求。磁心存储技术是电子计算机中应用时间较长的一种操作内存技术,直到目前为止,磁心存储器仍然在计算机中大量使用着,但其某些性能已不能完全适应计算技术日益发展的需要。磁心存储器的生产和应用比例正处于逐年下降的趋势。由于半导体存储技术在发展中显示出了明显的优越性,在某些性能上已超过磁心存储技术。半导体存储技术的迅速发展对大、中、小各类电子计算机都有相当大的影响。目前许多大、中型电子计算机的操作内存储器已逐步由 First, the foreword The rapid development of computing technology put forward new requirements for storage technology. Magnetic core storage technology is a kind of operating memory technology with long application time in electronic computer. Until now, magnetic core memory is still widely used in computers, but some of its performance can not fully meet the needs of the growing development of computing technology. The production and application of magnetic core memory is in the trend of declining year by year. As semiconductor memory technology has shown significant advantages in the development, in some properties have exceeded the core storage technology. The rapid development of semiconductor memory technology for large, medium and small types of electronic computers have a considerable impact. At present, many large and medium-sized electronic computer operating memory has been gradually