OCR J277 1.2.1: Primary storage (memory)
The free BugBot lesson that teach this point, a robot to try it on, and the past-paper questions that test it.
What it covers
A processor needs somewhere to keep the program it is running and the data it is working on. That is primary memory: memory the CPU can reach directly and quickly. There are several kinds, each with a different job. This lesson sorts out RAM, ROM, cache and virtual memory, and builds a model of what happens when RAM runs out.
- RAM
- ROM
- Cache
- Virtual memory
Or do it in the simulator, with tasks that mark themselves
Lessons that teach it
- F9.6 Memory Logic and computer systems
RAM, ROM, cache and virtual memory.
Try it on a robot
The task from F9.6 Memory, running here. Change the program and press Run.
The specification is OCR's own document; this page says which of our lessons teach point 1.2.1 and is not endorsed by the board.