MAR: GCSE Computer Science Definition

What is the MAR?

The Memory Address Register (MAR) holds the memory address of the location in main memory (RAM) where data or instructions are to be fetched from.

The MAR is crucial to the 'fetch' stage of the fetch-decode-execute cycle.

MAR Revision Resources to Ace Your Exams

Explore MAR in more detail and master other key related terms such as the memory data register (MDR) and accumulator (ACC) in our revision note pages here:

Von Neumann Architecture (OCR GCSE Computer Science)
CPU components & their function (AQA GCSE Computer Science)

Challenge yourself with our expertly created topic questions and reinforce your learning with our interactive flashcards. 

GCSE Computer Science Revision Resources