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GCSE Computer Science · key term
Memory directly accessible by the CPU, excluding cache and registers. RAM and ROM are examples.
Used by AQA
Paper 2
Memory directly accessible by the CPU that stores data and instructions. It includes RAM and ROM, but excludes registers and cache.
Revise: CPU Components and Main MemoryThe central processing unit (CPU) executes those instructions. It works with main memory, which stores instructions and data where the CPU can access them directly.
Memory that holds instructions and data currently being used by the computer.
Distinguish registers inside the CPU from main memory. Both store information, but registers hold very small amounts needed immediately during processing.
When explaining fetch, state both the source and destination: the next instruction moves from main memory to the CPU.
Reading data from or writing data to main memory may happen during execution. Do not claim that every instruction must do both.
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Memory directly accessible by the CPU, excluding cache and registers. RAM and ROM are types of main memory.
