AQA 7517 4.7.3.2: The Fetch-Execute cycle and the role of registers within it
The free BugBot lessons that teach this point, a robot to try it on, and the past-paper questions that test it.
Lessons that teach it
- A9.3 The fetch-decode-execute cycle in detail Computer architecture
Register transfer notation, the buses at each step, a full register trace, and a stored program that plays notes. - A9.10 Project: a processor of your own Computer architecture
Build a von Neumann machine with register transfers, addressing modes, flags and memory-mapped I/O that plays a scale on the robot.
Try it on a robot
The task from A9.3 The fetch-decode-execute cycle in detail, running here. Change the program and press Run.
The specification is AQA's own document; this page says which of our lessons teach point 4.7.3.2 and is not endorsed by the board.