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Prepared by :
1. Bashdar Anwar
2. Sara Nadr
3. Mhamad Khdr
Supervisor
Ms Deman Rahman
Read-only memory (ROM) is a type of storage medium
that permanently stores data on personal computers (PCs)
and other electronic devices.
It is type of internal memory.
The data and instructions in ROM are stored by the
manufacturer at the time of its manufacturing. This data and
programs cannot be changed or deleted after wars.
The data or instructions store in ROM can only be read but
new data or instructions cannot be written into it> This is the
reason why it is called Read only memory.
ROM stores data and instructions permanently.
When the power is turned off, the instructions stored in ROM
are not lost. That is the reason ROM is called non-volatile
memory.
There are five basic ROM types:
ROM- Read Only Memory
PROM-Programmable Read Only Memory
EPROM-Erasable Programmable Read Only Memory
EEPROM-Electrically Erasable Programmable Read Only Memory
Flash EEPROM Memory
PROM stands for programmable Read Only Memory.
This from of ROM is initially blank. The user or manufacturer
can write data/program on it by using special devices.
However, once the program or data is written in PROM chip
cannot be changed.
If there is an error in writing instructions or data in PROM ,
the error cannot be erased be erased rather PRON chip becomes
unusable.
EPROM stands for Erasable Programmable Read Only Memory.
This from of ROM is also initially blank.
The user or manufacturer can write program or data on it by using
special devices.
Unlike PROM , the data written in EPROM chip can be erased by
using special devices and ultraviolet rays.
New data can also be added.
When EPROM is in use, its contents can only be read.
EEPROM stands for Electrically Erasable Programmable Read
Only Memory.
This kind of ROM can be written or changed with the help of
electrical devices.
So data stored in this type of ROM chip can be easily
modified.
Flash memory is an electronic non-volatile computer storage
medium that can be electrically erased and reprogrammed.
Introduced by Toshiba in 1984, flash memory was developed
from EEPROM ( Electrically Erasable Programmable Read Only
Memory).
Rom hard on computer mmmmmmmnmmmmmnmmmmmnnn

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Rom hard on computer mmmmmmmnmmmmmnmmmmmnnn

  • 1. Prepared by : 1. Bashdar Anwar 2. Sara Nadr 3. Mhamad Khdr Supervisor Ms Deman Rahman
  • 2. Read-only memory (ROM) is a type of storage medium that permanently stores data on personal computers (PCs) and other electronic devices.
  • 3. It is type of internal memory. The data and instructions in ROM are stored by the manufacturer at the time of its manufacturing. This data and programs cannot be changed or deleted after wars. The data or instructions store in ROM can only be read but new data or instructions cannot be written into it> This is the reason why it is called Read only memory.
  • 4. ROM stores data and instructions permanently. When the power is turned off, the instructions stored in ROM are not lost. That is the reason ROM is called non-volatile memory.
  • 5. There are five basic ROM types: ROM- Read Only Memory PROM-Programmable Read Only Memory EPROM-Erasable Programmable Read Only Memory EEPROM-Electrically Erasable Programmable Read Only Memory Flash EEPROM Memory
  • 6. PROM stands for programmable Read Only Memory. This from of ROM is initially blank. The user or manufacturer can write data/program on it by using special devices. However, once the program or data is written in PROM chip cannot be changed. If there is an error in writing instructions or data in PROM , the error cannot be erased be erased rather PRON chip becomes unusable.
  • 7. EPROM stands for Erasable Programmable Read Only Memory. This from of ROM is also initially blank. The user or manufacturer can write program or data on it by using special devices. Unlike PROM , the data written in EPROM chip can be erased by using special devices and ultraviolet rays. New data can also be added. When EPROM is in use, its contents can only be read.
  • 8. EEPROM stands for Electrically Erasable Programmable Read Only Memory. This kind of ROM can be written or changed with the help of electrical devices. So data stored in this type of ROM chip can be easily modified.
  • 9. Flash memory is an electronic non-volatile computer storage medium that can be electrically erased and reprogrammed. Introduced by Toshiba in 1984, flash memory was developed from EEPROM ( Electrically Erasable Programmable Read Only Memory).