Created by a student who achieved 10 grade 9s at GCSE, this mindmap covers everything you need to know from Section 1.2 of the OCR GCSE Computer Science specification, Memory and Storage. Be sure to check out the other mindmaps in this series!
The name Random Access Memory comes from the ability
CPU to access any part of the memory in the same amoun
The operating system (or part currently in use)
It can be read from and written to
The software currently in use At any one time it will normally store
The data which the software is using Loses data when device
is switched off
Read-only memory (ROM) is used to store data that needs to be
permanently held in primary storage, even when a computer has no power
Data is read from ROM, but cannot be written to it
It is non-volatile as the data isn't lost if the power is off
This is known as the bootstrap
Stores the initial program that is RO
It tells the computer where it will run when the computer is turned on
find the operating system on the hard drive
The BIOS can run without a hard drive
It also stores the Basic Input/Output System (BIOS)
or other secondary storage being present
It controls basic technical configuration of the computer such as the processor speed and system time
They have a very large storage
capacity, up to 6TB or more
Fixed magnetic hard disks are
used in many PCs and laptops
They are a very cheap form of storage
Hard Dis
compared to solid state drives
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