How the ALU Works with Other Components
Part of Arithmetic Logic Unit (ALU) · GCSE GCSE Computer Science revision
This key facts covers How the ALU Works with Other Components within Arithmetic Logic Unit (ALU) for GCSE Computer Science. Revise Arithmetic Logic Unit (ALU) in 3.4 Computer Systems for GCSE Computer Science with 15 exam-style questions and 12 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 5 of 7 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 5 of 7
Practice
15 questions
Recall
12 flashcards
How the ALU Works with Other Components
- Gets data from: Accumulator (ACC) and registers/memory
- Controlled by: Control Unit (tells ALU which operation to perform)
- Stores results in: Accumulator (ACC) - results overwrite previous ACC value
- When it operates: During the EXECUTE stage of the FDE cycle
Example flow: Instruction "ADD 5" → Control Unit tells ALU "perform addition" → ALU takes current ACC value (8), adds 5 → Result (13) goes back to ACC
Keep building this topic
Read this section alongside the surrounding pages in Arithmetic Logic Unit (ALU). That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Arithmetic Logic Unit (ALU)
What does ALU stand for?
Explain how the role of the ALU differs from the role of the Control Unit (CU).
Quick Recall Flashcards
15 questions on Arithmetic Logic Unit (ALU) — practise free
Instant marking, adaptive difficulty, and 12 spaced repetition flashcards. Free until your GCSEs.
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