1G字节高程数据库快速存取技术研究

A Fast Access Technique of 1G Byte Altitude Database

本文是高程数据库快速存取技术研究项目的一部分。文中主要研究了以半导体EPROM存储器为基础,以80368微机为核心的大容量数据库快速存取技术,经过实验提出了在386微机上实现1G字节快速存取的方案。实践证明,使用计算机的I/O口可以实现数十个4G字节的数据存取。在16MHz的系统时钟下,其两个字节的存取时间为5至6μs,与理论计算值相吻合。

This paper, as part of report on the fast access to the altitude database, deals withthe fast access to a mass database, based on EPROM and in support of the microcomputer80386. On the basis of experiments, a scheme is proposed of the construction of a database of1G byte capacity in a microcomputer 386. It has been proved that a capacity of 4G byte is re-alizable via the I/O interface and that it takes 5-6 us to access 2 bytes at 16 MHz of clock,which agrees well with the theoretical value.