Page 16 - TP_Modular_V2.1_Class3
P. 16

01




                    02                                                         COMPUTER MEMORY














                                 Your Aim

                                 to learn about:

                                        Memory                      Measuring the Computer’s Memory




                  When you were a child, you were taught about alphabets and numbers. Do you
                  still remember those? How? This is so because those were stored in your memory.
                  Just like human memory, computers also have memory to store all the data and

                  instructions for performing various tasks.

                      MEMORY

                  The data and instructions that are entered into the computer using input devices

                  are stored inside the memory. There are two types of memory:  Primary memory
                  and Secondary memory.
                  Primary Memory


                  This is the main memory of the computer. CPU can directly access this memory. It is
                  fixed on the motherboard of the computer. Primary memory is further divided into
                  two types: Random Access Memory (RAM) and Read Only Memory (ROM).
                  Random Access Memory (RAM)


                  RAM is a temporary memory. The information stored in
                  this memory is lost when the computer is turned OFF.
                  That’s why it is also called volatile memory.                                         RAM

                                           Read Only Memory (ROM)

                                           Information stored in ROM is  permanent  in nature,  i.e., it

                                           holds the data even if the system is switched OFF. It holds
                                           the instructions required to start a computer. It is also called
                    ROM                    non-volatile memory.


                   14       Modular (Ver. 2.1)-III
   11   12   13   14   15   16   17   18   19   20   21