What is the fastest access speed?

The fastest access is the internal memory. The internal memory is one of the important components in the computer. It is a bridge to communicate with the CPU. All programs in the computer are run in the internal memory. , so the performance of internal memory has a great impact on the computer.

#The fastest access speed is the internal memory.

Internal memory is one of the important components in the computer. It is the bridge that communicates with the CPU. All programs in the computer are executed in the internal memory, so the performance of the internal memory has a great impact on the computer. Internal memory (Memory) is also called memory. Its function is to temporarily store operation data in the CPU and exchange data with external memories such as hard disks.

As long as the computer is running, the CPU will transfer the data that needs to be calculated into the memory for calculation. When the calculation is completed, the CPU will transmit the results. The operation of the memory also determines the stable operation of the computer. Memory is composed of memory chips, circuit boards, golden fingers and other parts.

Related introduction:

Register is a very important storage unit in integrated circuits, usually composed of flip-flops. (Recommended learning: PHP video tutorial)

In integrated circuit design, registers can be divided into two categories: registers used internally within the circuit and registers that serve as internal and external interfaces. Internal registers cannot be accessed by external circuits or software, and are only used to implement storage functions for internal circuits or to meet circuit timing requirements.

The interface register can be accessed by internal circuits and external circuits or software at the same time. The registers in the CPU are one of them. As an interface between software and hardware, they are well known to a wide range of general programming users.

In the computer field, registers are components inside the CPU, including general-purpose registers, special-purpose registers and control registers.

Registers have very high read and write (access) speeds, so data transfer between registers is very fast.

The register is the top of the memory hierarchy and the fastest way for the system to obtain operating data. Registers are usually measured by the number of bits they can hold,

for example, an "8-bit register" or a "32-bit register". Registers are implemented as register files, but they may also be implemented using separate flip-flops, high-speed core memory, thin film memory, and other means on several machines.

Registers are usually used to refer to a register group that can be directly indexed by the output or input of an instruction. It is more appropriate to call them "architectural registers".

For example, the x86 instruction set defines a set of eight 32-bit registers, but an actual x86 instruction set CPU can contain more than eight registers.

Features

Registers are divided into internal registers and external registers. The so-called internal registers are actually some small storage units that can also store data. But compared with memory, registers have their own unique characteristics:

①The registers are located inside the CPU, and the number is very small, only fourteen

②The data that the registers can store is not necessarily It is 8bit. There are some registers that can store 16bit data. For some registers in the 386/486 processor, they can store 32bit data

③Each internal register has a name, but there is no address number similar to the memory.

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