1.2 Memory

Description

Year 10 Computing Mind Map on 1.2 Memory, created by Khang Duong on 15/12/2017.
Khang Duong
Mind Map by Khang Duong, updated more than 1 year ago
Khang Duong
Created by Khang Duong over 6 years ago
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Resource summary

1.2 Memory
  1. SSD (solid state drive)
    1. Solid storage media with no moving parts or a device that uses flash memory.
    2. RAM (Random access memory)
      1. RAM is non volatile as it erases data when turned off and it holds data and information currently used by the CPU.
      2. Cache
        1. Cache is a hardware or software component that stores data to make the CPU execute instructions and data faster.
        2. Flash Memory
          1. A kind of memory that stores data without a use of power.
          2. Virtual Memory
            1. Virtual memory is simulated memory that is written to a file on a hard drive that appears to exist as RAM but is secondary storage
            2. ROM (Read Only Memory)
              1. ROM is volatile and is not erased. It is permanently on the ROM chip and holds the start up system and the bootstrap loader.
              2. Registers
                1. MAR (Memory address register) copies and transfers the data on the PC (program counter) through the address bus.
                  1. PC (Program counter) is where the next instruction is held in the processor.
                    1. MDR/MBR (Memory Data/Buffer Register) is where data and instructions are held to be executed.
                      1. CIR (Current Information Register) is where the information from the MDR is held after it has been executed.
                      2. POST (Power On Self-Test) BIOS Chip performs checks to make sure components are present in the system and when it is completed it boots up system but if it fails, it displays error message.
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