1.2 Memory

1.2 Memory

1. CPU

   • Central Processing Unit
   • Fetches data, decodes data and executes the data.
   • Processes data
   • ALU
   • Brain/ engine of the computer

2. Volatile

   • Gets emptied when the power is turned off

3. RAM

   • Random Access Memory
   • Volatile
   • Temporarily holds data/ information in it's storage until power has been turned off

4. ROM

   • Read Only Memory
   • Contains the BIOS/ Boot strap instructions
   • HBasic Input/ Output contains programs to load the hardware
   • StatIc ROM
     • Uses 5 transistors which are wired together to represent each bit
     • Doesn't need to be refreshed
   • Dynamic ROM

5. Firmware

   • Permanent Software programmed into non-volatile memory devices
   • Held in...
     • ROM
     • EPROM
     • Flash memory

6. Non-Volatile

   • Doesn't loose data when the device is turned off

7. BIOS

   • Basic Input/ Output contains programs to load the hardware
   • Manages data flow in computer's operating system and attached devices like...
     • Keyboard
     • Mouse
     • Video adapter
     • Printer

8. Disk Thrashing

   • When a computer's virtual memory system is in a constant state of paging