1.2 Memory

1.2 Memory

1. RAM

   • Random Access Memory
   • Stores programs and data in use
   • volatile
   • After RAM is full, everything goes to virtual memory

2. ROM

   • Non volative. When the computer is turned the data isn't deleted and the ROM stays on for the boot sequence
     • Boot sequence
       • POST
         • 1) BIOS performs check
         • Power On Self-Test
         • 2) Check peripheral devices
         • 3) When check is complete it opens the operating system
       • 1) ROM opens the boot sequence
       • 2) The boot sequence sends a signal to the hard disk and starts the operating system
       • 3) It turns on your computer

3. Virtual Memory

   • The RAM supports the computer to do temporary tasks, but the virtual memory supports the RAM. when its full things are sent to the virtual memory
   • Not as fast as RAM
   • Volatile

4. Flash Memory

   • Has no moving parts (solid state media)
   • Memory stick, SSD, SD card
   • Portable - Can take it everywhere
   • Compatible
   • Cheap
   • Expensive when more storage is needed
   • Break easily