>>>>>型号:8421-CC-PS 处理器
【功能描述】
8421-CC-PS插件 主板 处理器
CPU包括运算逻辑部件、寄存器部件，运算器和控制部件等。
折叠运算逻辑部件
运算逻辑部件，可以执行定点或浮点算术运算操作、移位操作以及逻辑操作，也可执行地址运算和转换。
折叠寄存器部件
寄存器部件，包括通用寄存器、专用寄存器和控制寄存器。
通用寄存器又可分定点数和浮点数两类，它们用来保存指令中的寄存器操作数和操作结果。
通用寄存器是中央处理器的重要组成部分，大多数指令都要访问到通用寄存器。通用寄存器的宽度决定计算机内部的数据通路宽度，其端口数目往往可影响内部操作的并行性。
专用寄存器是为了执行一些特殊操作所需用的寄存器。
控制寄存器通常用来指示机器执行的状态，或者保持某些指针，有处理状态寄存器、地址转换目录的基地址寄存器、特权状态寄存器、条件码寄存器、处理异常事故寄存器以及检错寄存器等。
有的时候，中央处理器中还有一些缓存，用来暂时存放一些数据指令，缓存越大，说明CPU的运算速度越快，目前市场上的中高端中央处理器都有2M左右的二级缓存，高端中央处理器有4M左右的二级缓存。
>>>>>型号:8421-CC-PS 处理器
【英文介绍】
8421-CC-PS plug-in motherboard processor
CPU includes arithmetic logic component, register component, arithmetic unit and control component.
Folding operation logic unit
An operational logic unit that can perform fixed-point or floating-point arithmetic operations, shift operations, and logical operations, as well as address operations and conversions.
Folding register unit
A register component includes a general purpose register, a special purpose register and a control register.
General purpose registers can be divided into fixed-point numbers and floating-point numbers, which are used to store register operands and operation results in instructions.
The general purpose register is an important part of the central processing unit (CPU), and most instructions need to access the general purpose register. The width of the general purpose
register determines the width of the data path inside the computer, and the number of its ports often affects the parallelism of the internal operation.
A special register is a register that is needed to perform some special operations.
Control registers are usually used to indicate the state of the machine's execution, or to hold some Pointers, including processing state registers, address translation directory base registers,
privileged state registers, condition code registers, processing exception registers, and error detection registers.
Sometimes, there are some caches in the central processor, used to temporarily store some data instructions, the larger the cache, the faster the CPU operation speed, the current market of
high-end central processors have about 2M of the second-level cache, high-end central processor has about 4M of the second-level cache.
>>>>>型号:8421-CC-PS 处理器
