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Systems ArchitectureLow Exam FrequencyOCR

MAR & MDR

Revise MAR & MDR in Systems Architecture for GCSE Computer Science with 15 exam-style questions and 10 flashcards. This topic appears less often, but it can still pick up marks when it appears in mixed-topic papers.

Study this topic

1

The Library Search

Introduction2

CPU Registers Detail

Diagram3

Deep Dive: How MAR and MDR Work Together

Deep Dive4

MAR - Memory Address Register

Key Facts5

MDR - Memory Data Register

Key Facts6

MAR vs MDR - Quick Comparison

Key Facts7

Exam Tips - MAR and MDR

Exam Tips

Sample Flashcards

What does MAR hold?
The address of data to be read/written (WHERE)
What does MDR hold?
The actual data being transferred (WHAT)

Sample Questions

What does MAR stand for?

  • A. Memory Access Register
  • B. Memory Address Register
  • C. Memory Arithmetic Register
  • D. Main Address Register
1 markfoundation

Explain the difference between the MAR and the MDR.

2 marksstandard

15

exam-style questions

10

revision flashcards

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