4. The principle of computer composition of Toad Note four memory

4. The principle of computer composition of Toad Note four memory

This famous saying:"to give people happiness is not the physical benefits, nor wealth, but integrity and prudence." -- Demuchlite "

Continue to learn the next memory probably.

Welcome reprint, Reprint please mark out: http://blog.csdn.net/notbaron/article/details/48012237

1. Storage Media Classification

(1) Semiconductor memory

Volatile TTL, MOS

(2) Magnetic surface memory

Magnetic head and Carrier magnets

(3) Core memory

Hard magnetic materials, ring elements

(4) Disc memory

Laser, magneto-optical materials

2. Classification by Access mode

(1) Access time is independent of physical address (random access)

(2) Access time is related to physical address (serial access)

3. Hierarchy of Memory4. Read-only memory (ROM)

1. Mask ROM (Mrom)

The MoS tube is "1" at the intersection of the row and column selection line

2. PROM (Disposable programming)

Fuse broken to "0"

Fuse not broken to "1"

5. High-speed buffer memory

Problem, avoid CPU "empty" phenomenon. Speed difference between CPU and main memory (DRAM)

5.1 CaHow Che works

5.2the basic structure of the Cache

address mapping of 5.3 cache– main memory1. Direct Mapping

2. Full-linked Mappings
3. Group-Linked Mappings

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

4. The principle of computer composition of Toad Note four memory