RAM, ROM, VM MIND MAP

RAM, ROM, VM MIND MAP

1. RAM

   • Volatile memory is when the computer is turned off. RAM does not work at all.
     • Random Access Memory
       • Is a hardware device that allows information to be stored and retrieved on a computer.
     • Can re write or edit

2. ROM

   • Read Only Memory
     • Non volatile which means it is still working when the computer is turned off
     • Can't be edited only read.
       • ROM contains the programming that allows your computer to be "booted up" or regenerated each time you turn it on.

3. Virtual Memory

   • Computers have a finite amount of RAM so memory can run out, especially when multiple programs run at the same time. A system using virtual memory can load larger programs or multiple programs running at the same time, allowing each one to operate as if it has infinite memory and without having to purchase more RAM.
   • As part of the process of copying virtual memory into physical memory, the OS divides memory into pagefiles or swap files that contain a fixed number of addresses. Each page is stored on a disk and when the page is needed, the OS copies it from the disk to main memory and translates the virtual addresses into real addresses.