MAR - Memory Address Register
Part of MAR, MDR & Registers · GCSE GCSE Computer Science revision
This key facts covers MAR - Memory Address Register within MAR, MDR & Registers for GCSE Computer Science. Revise MAR, MDR & Registers in 3.4 Computer Systems for GCSE Computer Science with 15 exam-style questions and 10 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 4 of 8 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 4 of 8
Practice
15 questions
Recall
10 flashcards
MAR - Memory Address Register
- Purpose: Holds the ADDRESS of the memory location the CPU wants to access
- Connected to: The Address Bus
- Direction: One-way - CPU writes to MAR, which sends to memory
- Contains: A memory address (like a postcode or house number)
- Think: "WHERE do I need to look?"
MAR is like the GPS coordinates you type into your sat nav - it tells the system WHERE to go, not what's there.
Keep building this topic
Read this section alongside the surrounding pages in MAR, MDR & Registers. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for MAR, MDR & Registers
What does MAR stand for?
Explain the difference between the MAR and the MDR.
Quick Recall Flashcards
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