Memory

Memory :

                   Memory is an area of a computer that stored data and instruction to be accessed by processors as well as the result of processing. it consists of one more chips on motherboard or some other circuit boards in the computer. 

 Structure of Main Memory 

                The main memory of a computer consists of thousands or million of cells of storage location. Each cell can store a bit. One bit can represents 0 or 1.Bit  stands for binary digit. The ,memory cells are logically cell organized into groups of 8 bits knows as byte. 

Each byte in the memory has unique number assigned to it .The number is knows as the address of that byte. The number shows the byte number assigned to a byte. 

it is also known as the address of the byte. 

Accessing Data in Main Memory:

                                                                         The main memory can be viewed as collection of byte arranged in an order. CPU can access and byte from main memory. Different bytes can be accessed directly in random order in equal amount of time. 

That is why is called direct access memory.

 

Types of Memorial:

                                         There are two types of memory in computer that as follow;

Volatile Memory:

                                    Volatile memory loess its contents when the computer is turned off. RAM is the most common types of volatile memory.

Non-volatile Memory:

                                              It does not lose its contents when the computer is turned off. ROM, flash memory and CMOS an example of non-volatile memory.

RAM:

            RAM stands for random access Memory. it is an also called direct access memory. Random access means that each individual byte in entire memory can be accessed directly. A program must be loaded into. 

RAM before execution. 

DRAM:

                 DRAM stands for Dynamic Random Access  Memory. It is used in most of the computer. It is the least expensive kind of RAM. DRAM is recharged or refreshed again and again to ,maintain its  data. The processor cannot access that of DRAM when it is being refreshed. That is why it is slow.

 

SRAM :

                SRAM stands for Static Random Access Memory. It can store data without any need of frequent, That is why it is faster than DRAM . it utilized  less power than DRAM. SRAM is more expensive . it is normally used  to build a very fast memory knows as cache memory .   

                           Between SRAM and DRAM

                                         coming soon