1.2 memory with additional information

1.2 memory with additional information

1. R.A.M.

   • Random access memory
   • Volatile
     • Not stored once device is turned off
       • stores user data.
         • memory can be written to or read from

2. R.O.M.

   • Read Only Memory
   • non-volatile
     • stays on the device when it is turned off
   • Used to store the BIOS/bootstrap loader.
     • Memory can only be read from not written to.

3. virtual memory

   • is secondary storage
   • temporary storage
     • Located in the hard-disk

4. Firmware

   • permanently stored in the R.O.M

5. portable

   • can take it with you

6. CPU

   • central processing unit

7. Disk thrashing

   • when a computers virtual memory is in a constant state of paging

8. Flash Memory

   • hard disk magnetic storage

9. internal

   • inside

10. external

    • outside

11. BIOS

    • basic input/output system
      • contains programs to run the hardware

12. secondary storage

    • hardware which stores data other than ram/rom

13. Hard disk

    • Magnetic storage device (non volatile)
    • holds your files and programs

14. SRAM

    • Static RAM
      • 5 transistors wired together to represent a bit.

15. Bootstrap Loader

    • Loads the computer Operating system when he computer boots up.

16. Dynamic RAM

    • This needs to be refreshed every few milliseconds.
    • Contains 1 transistor capacitor that hold charge briefly.

17. Primary Memory

    • Memory used to store data and instructions that are required by the CPU.

18. Cache Memory

    • Right next to the CPU so it is faster than going to the RAM

19. Flash memory

    • Electrons are forced into a layer between two layers.
      • which hold a charge using a high electric current.

20. Some memory is where data is stored for programs.

    • it can be volatile
      • it can be non-volatile