What memory can the CPU directly access?

The memories that the CPU can directly access are internal memory, cache, read-only memory and random access memory. Internal memory is one of the most important components in the computer. It is the bridge that communicates with the CPU. All programs in the computer are run in the internal memory.

The memory that the CPU can directly access is the internal memory and a large number of registers inside the CPU, including cache (cache), read-only memory (ROM), Random access memory (RAM).

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.

Cache usually includes first-level, second-level and third-level cache, which are directly integrated inside the CPU. They have small capacity but very fast speed to meet the CPU's access to commonly used data;

ROM Generally used in SOC CPU systems, ordinary PCs only have BIOS information stored in ROM;

RAM is commonly referred to as memory, because the CPU integrates a memory controller, so it can be accessed directly, but the speed is slow Similar to cache but with much larger capacity.

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