If you see my notes and are confused about the unit numbers, i am too. This website has incorrect unit numbers that are not based on the exam board. Just look at the name of the notes to see if that is what you are looking for. This is a content heavy chapter. I would advise you to learn how to draw the different architectures that you learn, as well as understanding in detail the fetch decode execute cycle. If you can memorise all notes and understand them you can get a guaranteed A.

Notes for the computer systems and architecture module of AQA A Level Computer Science. Information is summarised into bullet points and can be easily turned into flashcards. Condense notes with diagrams