PM803F 3BDH000530R1 ABB 主存储存器

描述

主存储器(Main memory)，简称主存。是计算机硬件的一个重要部件，其作用是存放指令和数据，并能由中央处理器(CPU)直接随机存取。现代计算机是为了提高性能，又能兼顾合理的造价,往往采用多级存储体系。即由存储容量小，存取速度高的高速缓冲存储器，存储容量和存取速度适中的主存储器是必不可少的。主存储器是按地址存放信息的，存取速度-般与地址无关。32位(比特)的地址最大能表达4GB的存储器地址。这对多数应用已经足够，但对于某些特大运算量的应用和特大型数据库已显得不够，从而对64位结构提出需求。

PM803F 3BDH000530R1

Main memory, abbreviated as main memory. It is an important component of computer hardware that stores instructions and data, and can be directly accessed randomly by the central processing unit (CPU). Modern computers often use multi-level storage systems to improve performance while also considering reasonable costs. A cache memory with small storage capacity and high access speed, as well as a main memory with moderate storage capacity and access speed, are essential. The main memory stores information by address, and the access speed is generally independent of the address. A 32-bit address can represent up to 4GB of memory address. This is sufficient for most applications, but it is no longer sufficient for some applications with large computational complexity and large databases, thus requiring a 64 bit architecture