1.2 memory

1.2 memory

1. CPU

   • Central Processing Unit
   • Where calculations take place
   • memory/storage unit
   • ALU
   • Control unit
   • Brain/engine of the computer

2. RAM

   • Random Access Memory
   • can be read and changed in any order
   • typically used to store working data and machine code
   • volatile

3. Volatile

   • Gets emptied when power is turned off

4. Firmware

   • Permanent software programmed into ROM

5. ROM

   • Read only memory
   • non-volatile
   • can't be modified once memory device is manufactured

6. Non-volatile

   • Doesn't get emptied when power is turned off

7. BIOS

   • Basic input/output system
   • performs hardware initialisation before boot up
   • provides runtime services for operating systems and programs
   • first software to run when powered on

8. Disk thrashing

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