Computer Science GCSE
MAR (Memory Address Register)
What MAR (Memory Address Register) means in Computer Science GCSE, as defined for OCR.
Definition of MAR (Memory Address Register)
Check what you remember
Read the wording for your board, then hide it and explain MAR (Memory Address Register) in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Holds the address of the memory location currently being read from or written to, sending that address along the address bus.
Topics that use MAR (Memory Address Register)
- Architecture of the CPU (OCR GCSE)
Related terms
- CPU purpose
- Execute stage
- Fetch stage
- Program Counter
- Von Neumann architecture
- ALU operations
- Cache performance
- Control unit coordination
Using MAR (Memory Address Register) in the exam
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