1.2 Memory

1.2 Memory

1. ROM

   • READ ONLY MEMORY
     • ROM is NON volatile
       • ROM is a memory that cannot be changed by a programmer or user
         • ROM stores the instruction for the computer when its turned off

2. RAM

   • RANDOM ACCESS MEMORY
     • A typical computer system will have 256MB to 4MB installment
       • RAM is volatile memory
         • Volatile
           • It is way faster than a normal computer
             • Volatile memory has many uses
               • Once turned off computer the data immediately gets deleted
             • Non volatile
         • The data in RAM is deleted once turned the device off
     • RAM is very expensive
   • RAM stores data and machine code currently being used

3. Flash

   • a small device you can store data and memory on
     • NON volatile

4. Cache

   • Small bits of memory
     • Store repeated instructions so it's faster
       • It's memory can be accesses faster than RAM

5. Solid State Memory

   • Has no moving parts
     • smaller than a hard drive
       • non volatile
         • often found in mobile devices

6. Flash Memory

   • Flash memory is very portable
     • Non volatile
     • erases data in a unit called block