Computer composition principle-Reading Notes (3) internal memory

Memory category:

Classified by storage medium: magnetic surface/semiconductor memory

Classified by access method: Random/sequential access (TAPE)

Category by read/write function: Rom, Ram

Classified by information retention: permanent and non-permanent

Categories by the role of the storage system: Master/Slave/slow/Control

 

Hierarchical Structure of memory:

Cache: high-speed buffer memory, which is a high-speed and small-capacity semiconductor memory in computer systems. Solve the issue of speed mismatch between CPU and primary memory

Primary memory: The primary memory used to store a large amount of programs and data during computer operation.

External memory: external memory, which is a large-capacity auxiliary storage

 

Connections between Hierarchical Storage Systems:

 

Random memory: Ram, memory unit content can be retrieved or stored as needed, and the access speed is irrelevant to the location of the access unit (SRAM, Dram)

 

Read-only memory: Rom, read only at work, cannot be written. Reliable and highly confidential

 

Flash Memory: Flash Memory, high-density non-volatile read/write memory. Ram has both the advantages of Ram and Rom.

Computer composition principle-Reading Notes (3) internal memory