Primary Storage Device or Memory : A quality of computer are measure by it's speed, and speed are very much dependent on the Computer's "Primary Memory". So Primary memory is very important for any Computer System.
Question covered
To know more on different topic of COMPUTER visit dhide.blogspot.com
➤What is output Device ?
Primary Storage Devices | Computer Memory
Primary memory : Primary memory are used in the computer to perform primary works. Primary
memory is directly accessed by the CPU(Central Processing Units). All the run
time execution are done by the use of RAM, and Rom are help to access all the
information or data from CPU to RAM vice versa.
 |
| Primary Memory |
We need to know what primary memory is used before reading what is primary memory.
All of the computer's functions, such as input, processing, delivering appropriate output, etc. are all through this primary memory. We can take an example to help this process. In this slide you can see that we are trying to play music. The song file is on the hard disk but we have read that all running processes are run in primary memory. Here ROM helps to bring pieces of the song file into RAM, then the RAM runs programs from there. This way we can play songs on our computer.
 |
| Work of RAM & ROM |
Types of Primary Memory
Primary Memories are two types
- RAM (Random Access Memory)
- ROM (Read Only Memory)
**RAM : RAM is a field where all the instructions or data coming from the input device is submitted. Users can do both types of work by reading or writing any information directly from here.
If all the data is deleted from the RAM when the power connection is interrupted, there for the RAM is known as volatile memory. RAM are classified into two parts
- SRAM (Static RAM)
- DRAM (Dynamic RAM)
 |
| RAM |
**Static RAM: Static RAM is mainly built in transistor
technology, so it is much faster than Dynamic RAM. It is used at very low
amount of computer. This RAM takes little time to access data or data, so it is
more expensive than dynamic RAM.
**Dynamic RAM: Dynamic RAM is basically made of capacitor
technology. These capacitors need to refresh the memory very quickly because of
the power loss. This RAM is slow but its price is relatively low. These rams
are mainly used to increase the storage capacity.
**ROM: The data stored on ROM can keep this memory
permanently, so these memory are called non-volatile memory. The information
that is needed for computer work is stored in this memory. It should be
remembered that Computer ROM data is read only but not written.Computer ROM are generally four types
- PROM (Programmable Read Only Memory)
- EPROM (Erasable Programmable Read Only Memory)
- EEPROM (Electrically Erasable Programmable Read Only Memory)
- UVPROM (Ultra Violet Programmable Read Only Memory)
 |
| ROM |
Question covered
➥ What is Primary Memory ?
➥ What are the different types of Primary Memory ?
➥ Why the RAM called volatile memory .
➥ What are the Classification of RAM .
➥ What are the Classification of ROM .To know more on different topic of COMPUTER visit dhide.blogspot.com
Post a Comment